The phrase ‘website migration’ gets used for several quite different things, which is exactly why it confuses people. Moving to a new host, switching platforms, changing your domain, redesigning your site, restructuring your URLs, going from HTTP to HTTPS — all of these are called migrations, yet each carries different work and different risk. Understanding the types is the first step to knowing what you are actually facing and how carefully to tread.
This guide defines website migration clearly and then explains each major type: host, platform, domain, protocol, and structural migrations. It shows why the type matters so much for SEO and risk, which types are gentle and which demand real care, and how to identify exactly which migration you are doing. By the end, the umbrella term will resolve into a set of distinct, understandable moves.
Did you know?
‘Website migration’ is an umbrella term covering at least five distinct moves — host, platform, domain, protocol, and structural changes. They range from nearly risk-free to genuinely delicate, and knowing which you’re doing is the key to doing it safely.
Defining website migration
At its broadest, a website migration is any significant change to where or how a website is hosted, addressed, or structured — a change substantial enough that the site’s content, files, or URLs move from one state to another. That deliberately wide definition is why the term covers so much: moving servers, changing platforms, renaming the domain, restructuring URLs, and switching protocols are all migrations because each relocates or transforms the site in a meaningful way.
What unites them is that in every case, something fundamental about the site’s location or form changes, and that change must be managed so the site keeps working and search engines keep finding it. A cosmetic tweak is not a migration; moving your whole site to a new server, or changing every URL, is.
So the umbrella covers a spectrum of moves that share a common challenge — relocating or transforming a live website without breaking it or losing its search visibility. Defining it broadly is useful precisely because the same principles (back up, plan, redirect, test, verify) apply across the spectrum. But to plan a specific move, you need to know which type you are doing, because the work and the risk vary enormously.
Host migration
A host migration means moving your website from one hosting company to another while keeping everything else — your domain, your platform, your URLs — the same. This is the most common migration, typically driven by wanting better performance, support, features, or price than your current host provides. Practically, it involves copying your files and database to the new host and then pointing your domain’s DNS at the new server.
Because the domain and all the URLs stay identical, a host migration is the least risky type for SEO — search engines have indexed your addresses, and those addresses do not change; only the server answering them does. There is no need for redirects, and no inherent ranking impact when it is done cleanly. The main risks are practical: copying everything correctly, testing before cutover, and avoiding downtime during the DNS switch.
So a host migration is essentially a change of address for your server that leaves your public address untouched. It is the move most people mean by ‘switching hosts,’ and it is the gentlest introduction to migration — which is why hosts often offer to do it for you for free. Keep the same domain and URLs, and you sidestep the SEO complications that make other migration types more demanding.
Platform migration
A platform migration means moving your site from one content system to another — for example, from a website builder like Wix or Squarespace to WordPress, from WordPress.com to a self-hosted WordPress.org install, or from one e-commerce platform to another. Here the challenge is deeper, because you are not just copying files: the new platform stores and structures content differently, so content must be exported, transformed, and imported into a new system, and the design usually rebuilt.
This makes platform migration more involved and more error-prone than a host move. URLs often change because different platforms use different URL structures, which means redirects become necessary to preserve SEO. Functionality may differ too — features, plugins, or integrations from the old platform may need new equivalents on the new one. The content survives, but its container is rebuilt around it.
So a platform migration is a genuine transformation, not just a relocation. It is often worth doing — moving to a more capable, flexible, or affordable platform like WordPress is a common and rewarding upgrade — but it demands careful content mapping, redirect planning, and thorough testing. Recognising that you are doing a platform migration, not merely a host move, tells you to budget more time and care.
Domain migration
A domain migration means changing the web address of your site — moving from one domain name to another, such as during a rebrand or a switch to a better name. This is the type most likely to affect SEO, and for a clear reason: every single URL on your site changes, because the domain is part of every URL. Search engines have indexed your pages under the old domain, and all of that must be transferred to the new one.
The critical work in a domain migration is therefore the redirects: comprehensive, permanent 301 redirects mapping every old URL to its exact new counterpart, so the authority each page has accumulated passes to its new address. Alongside that, you notify search engines of the change through their tools, submit an updated sitemap, and update internal links and any references to the old domain. Done properly, a domain migration transfers your rankings; done carelessly, it can lose them.
So a domain migration is the delicate end of the spectrum, because it touches every URL and every ranking you have. It is entirely doable — sites rebrand and change domains successfully all the time — but it demands the most rigorous redirect planning and the most patience through the temporary ranking dip that follows. When your address changes, the whole game is carrying your search equity across with it.
Protocol and structural migrations
Two more types round out the picture. A protocol migration is the move from HTTP to HTTPS — adding an SSL certificate and switching your site to load securely. Technically this changes every URL (from http:// to https://), so like a domain migration it needs redirects from the old HTTP URLs to the new HTTPS ones, plus fixing any ‘mixed content’ where a secure page still references insecure resources. It is usually straightforward and is essentially mandatory today, since browsers and search engines both favour HTTPS.
A structural migration means changing your site’s URL structure or architecture without changing the domain — for example, reorganising your URL paths, changing permalink formats, or restructuring your site’s hierarchy. Because the individual page URLs change even though the domain does not, this too requires redirects from old URLs to new, and careful attention so internal links and navigation are updated.
Both of these share the domain migration’s core lesson: whenever URLs change, redirects are the mechanism that preserves your SEO, and thorough redirect mapping is non-negotiable. They differ from a host migration precisely in that URLs change, which is what elevates their risk. Recognising a protocol or structural migration as a URL-changing move tells you immediately that redirects must be at the centre of your plan.
Why the type matters so much
Understanding which type of migration you are doing is not academic — it directly determines how much SEO risk you carry and how much care the move needs. The single biggest dividing line is whether your URLs change. If they do not (a host migration), SEO risk is minimal and no redirects are needed. If they do (domain, protocol, or structural migrations, and often platform migrations), then comprehensive redirects become the make-or-break element.
The type also tells you where the work concentrates. A host migration is mostly about copying and testing cleanly. A platform migration is about content mapping and rebuilding. A domain migration is about redirect mapping and search-engine notification. Knowing your type lets you focus your effort where it matters and avoid being blindsided by risks specific to that move.
The table makes the pattern clear: the moment URLs change, redirects move to the centre of your plan, and SEO care rises sharply. A host migration sits safely apart as the one type where addresses stay put. So the first question to ask of any migration is simply ‘do my URLs change?’ — the answer tells you most of what you need to know about the risk and the work ahead.
How to identify your migration
To know exactly what you are facing, ask a short series of questions about the move. Am I changing my hosting company? (host migration). Am I changing my content system or builder? (platform migration). Am I changing my domain name? (domain migration). Am I going from HTTP to HTTPS? (protocol migration). Am I reorganising my URLs or site structure? (structural migration).
Many real moves answer ‘yes’ to more than one — switching hosts and platforms together, or changing domain and going HTTPS at once — and that is fine, but each combined change stacks its own work and risk. Where you have the choice, doing one type at a time makes each move simpler to plan, test, and recover from than bundling several changes into a single event.
Once you have identified your type (or types), you know your risk profile and where to concentrate effort: redirects for any URL change, content mapping for a platform move, clean copying and no-downtime cutover for a host move. That clarity turns the vague, intimidating idea of ‘migrating my website’ into a specific, manageable project. The umbrella term resolves, and you can plan the actual move in front of you.
Doing a host migration and want it handled for you?
If your move is a straight host migration, Hostinger offers free migration on its plans and its team copies your site over intact — files, database, and settings — so the gentlest migration type becomes effortless. You can start with Hostinger and let them handle the relocation.
FAQs
What is website migration?
Website migration is any significant change to where or how a website is hosted, addressed, or structured — moving to a new host, a new platform, a new domain, from HTTP to HTTPS, or reorganising your URL structure. It’s an umbrella term uniting several distinct moves that all share the challenge of relocating or transforming a live site without breaking it or losing search visibility.
What are the types of website migration?
Host migration (new hosting company, same everything else), platform migration (new content system, e.g. to WordPress), domain migration (new web address), protocol migration (HTTP to HTTPS), and structural migration (changed URL structure, same domain). They range from nearly risk-free (host) to delicate (domain), depending mainly on whether your URLs change.
Which migration type is riskiest for SEO?
Domain migration, because every URL changes and all your indexed pages and rankings must transfer to the new address via comprehensive 301 redirects. Protocol and structural migrations also change URLs and need redirects. A host migration that keeps the same domain and URLs carries the least SEO risk, since your addresses don’t change.
Is switching hosts a migration?
Yes — it’s a host migration, the most common type. You copy your files and database to the new host and point your domain’s DNS at it, keeping the same domain, platform, and URLs. Because the URLs don’t change, it’s the least risky type for SEO and needs no redirects; the care is in copying cleanly, testing, and avoiding downtime.
Why does the migration type matter?
Because it determines your SEO risk and where the work concentrates. The key dividing line is whether URLs change: if not (host migration), risk is minimal and no redirects are needed; if they do (domain, protocol, structural, often platform), comprehensive redirects become the make-or-break step. Knowing your type lets you focus effort correctly and avoid type-specific surprises.
Can a migration be more than one type at once?
Yes — many real moves combine types, like switching hosts and platforms together, or changing domain and going HTTPS at once. That’s fine, but each combined change stacks its own work and risk, so where you can choose, doing one type at a time makes each move simpler to plan, test, and recover from than bundling several into one event.
The bottom line
‘Website migration’ is an umbrella term, and the confusion it causes dissolves once you separate it into its distinct types. A host migration moves your site to a new hosting company while keeping the same domain, platform, and URLs — the most common move and the gentlest, with minimal SEO risk and no redirects needed. A platform migration moves you to a different content system like WordPress, transforming how content is stored and usually changing URLs. A domain migration changes your web address and is the most delicate type, because every URL and every ranking must transfer via comprehensive 301 redirects. Protocol migrations (HTTP to HTTPS) and structural migrations (changed URL paths) also change URLs and so likewise depend on redirects.
The reason the type matters so much is that it determines your risk and where your effort belongs, and the single biggest question is whether your URLs change. If they do not, as in a clean host move, SEO risk is minimal and the work is about copying and testing well. The moment they do, redirects move to the centre of the plan and care rises sharply. Identify your type — or types, since real moves often combine them — by asking whether you are changing host, platform, domain, protocol, or structure, and you convert the vague dread of ‘migrating my website’ into a specific, well-understood project you can plan and execute with confidence.
When you are ready, you can start with Hostinger and use code PROTIPS for the reader discount. Website migration is an umbrella term for several moves: host (new company, same URLs — lowest risk), platform (new system like WordPress), domain (new address — highest SEO risk), protocol (HTTP to HTTPS), and structural (changed URLs). The key question is whether URLs change: if yes, comprehensive 301 redirects are essential; if no (a host move), SEO risk is minimal. Identify your type to know your risk and where to focus.