Microsites and Campaign Pages vs Your Main Website

By Grocito17 October 2026

A microsite is a small, separate website built for one purpose, such as a product launch, event or campaign, while a campaign landing page is a single focused page for one offer. Use a microsite when the audience, brand or technology genuinely differs from your main site. Otherwise, a section or landing pages on the main website usually build more search authority and cost less to maintain.

Key takeaways

Microsites suit distinct audiences, separate brands, events and time-limited campaigns; most campaigns are better as landing pages on the main site.
Keeping content on your main domain tends to consolidate search strength and keep maintenance simple.
Subdomain, subfolder and separate domain each carry trade-offs for search, tracking and ownership.
Plan the end of the campaign at the start: redirects, archiving and who switches it off.
Every extra site adds cost: hosting, security updates, analytics and brand upkeep.
Templates let you launch campaign pages quickly without building a new site each time.

What are microsites and campaign landing pages?

A campaign landing page is one page built for one action, such as signing up for a webinar or requesting a quote. It is usually reached from an advert, email or social post. Our guide to landing page best practices that convert covers how to write one.

A microsite is a small group of pages, often with its own look, navigation and sometimes its own domain. It might promote a product line, a conference or a community programme.

The difference is scale and independence. A landing page lives within your existing site's design and tooling. A microsite is a mini-site with its own structure.

When does a separate microsite make sense?

Consider a separate site when at least one of these is clearly true:

Distinct audience or brand. The visitors are different from your main customers, or the product has its own identity.
Product launch with a different story. A new offering needs room to explain itself without competing with existing navigation.
Event. A conference or webinar series has its own schedule, speakers and registration flow.
Time-limited campaign. A short push with its own creative world and a clear end date.
Different technical needs. The experience needs a stack, hosting or performance profile that the main site cannot provide.
Organisational boundaries. A partner or business unit needs to run its own content independently.

If none of these applies, a microsite is often an expensive way to split your audience and your search strength.

When is a section of the main site better?

SEO authority. Links and mentions earned by a campaign help the main domain if the content lives there. On a separate domain they mostly help that domain.
Maintenance. One site means one set of updates, security patches, analytics and consent banners.
Navigation and cross-selling. Visitors can move naturally to related pages.
Brand consistency. One design system, one voice.
Cost. No extra hosting, domain renewals or design work.

A good default is: start on the main site, and move out only if the checklist below says you must.

Subdomain, subfolder or separate domain: what are the trade-offs?

As far as is publicly documented, search engines can crawl and index all three structures. What differs is how easily they associate the content with your main site and how much work you take on.

Subfolder (example: yourbrand.com/campaign)

Easiest to treat as part of the main site for authority and tracking.
Shares the main site's technology, which can be a limit or a convenience.
Usually the best default for content that supports your core business.

Subdomain (example: campaign.yourbrand.com)

Can run on a different stack or host.
Often needs extra setup for cross-site analytics.
Search treatment relative to the main site is less direct than a subfolder, so do not assume the main site gets all the benefit.

Separate domain (example: campaignname.com)

Maximum brand and technical independence.
Starts with no history and needs its own links, trust and promotion.
Another domain to register, renew and protect; see domain name strategy: choose and protect your domain.

Choose by purpose: a lasting content hub usually belongs in a subfolder; a short-lived, separately branded campaign may justify a separate domain.

How do you keep branding and design consistent?

Even a distinct microsite should feel connected to your organisation. Reuse your logo, core colours, typography and tone, and link back to the main site. Share a component library so buttons, forms and layouts behave the same way. Where the campaign has its own look, document what is allowed to differ and what must stay fixed, such as legal text, contact details and accessibility standards.

How do you track activity across several properties?

Use one analytics setup that can follow a visitor from the main site to the microsite and back, with cross-domain measurement configured where the domains differ.
Agree naming for campaign tags in links so reports stay readable.
Define conversions the same way everywhere, for example "form submitted".
Respect consent choices across all properties.
Keep a simple measurement plan per campaign.

See website analytics setup: what to track and why for the basics.

What is the lifecycle of a campaign site?

Many microsites are launched with energy and abandoned in silence. Avoid that.

Before launch: decide the end date, the owner and the success measures.
During: monitor performance and fix issues quickly.
After: choose one of three paths: archive the content with a note that the campaign has ended, redirect each URL to the closest relevant page on the main site, or keep the page if it still earns visits.
Clean up: remove forms that no longer work, cancel unused hosting and update any links you control.

Use permanent redirects when the content has moved for good so that visitors and links are not lost.

Who should own and host it?

Name an owner for every site, in marketing or product, plus a technical contact. Record where it is hosted, who holds the domain, how updates are made and who receives form submissions. Orphaned sites are a security and brand risk because nobody patches or reviews them.

What does maintaining many sites cost?

Each extra site brings its own hosting, SSL certificate, software updates, security checks, analytics, cookie banner, accessibility review and content updates. The cost is rarely in the build; it is in the months and years afterwards. Multiply that by every campaign and the saving from a quick one-off site disappears.

How do forms and CRM integration work across sites?

Whichever structure you choose, send every enquiry to one place. Use the same form fields, the same lead source tagging and the same CRM destination. Check spam protection and consent text on each form. If your campaign forms feed several tools, test the end-to-end path before launch.

Can templates speed up campaign pages?

Yes. Build a small set of campaign page templates in your CMS: hero and offer, benefits, proof, form, FAQ. Editors can then assemble a new page in a day without a developer, with consistent design, tracking and consent built in. A CMS with reusable blocks and approval steps makes this safe; our CMS services can help you set it up.

A decision checklist

Answer yes or no:

Is the audience clearly different from your main customers?
Does the campaign need a separate brand or visual identity?
Does it need a technology stack the main site cannot support?
Is it short-lived with a defined end date?
Do you have a named owner and budget to maintain it?
Can you track it alongside the main site?

If you answered yes to at most one, build landing pages on the main site. If you answered yes to several, a microsite may be justified, and you should choose subfolder, subdomain or separate domain on purpose.

An imaginary example

Imagine a software company launching a small add-on aimed at accountants, a group it has never marketed to. It builds a campaign page set in a subfolder of its main site, using shared templates, so the new content benefits from the main domain's credibility. Separately, it runs a two-day customer conference on its own domain with a custom schedule and registration. After the conference, it redirects the event pages to a recap article on the main site.

FAQ

What is the difference between a microsite and a landing page?

A landing page is a single page built for one action, such as a signup. A microsite is a small, separate set of pages with its own structure and often its own design or domain.

Is a microsite bad for SEO?

Not inherently, but a separate domain starts without the authority your main site has built, and it splits your effort. As far as is publicly documented, content on a subfolder is generally the simplest way to keep it associated with the main site.

Should I use a subdomain or a subfolder for a campaign?

Use a subfolder when the content supports your core business and should share its authority. Use a subdomain when a different technology or team needs to run it independently, and set up analytics so you can follow visitors across both.

What should I do with a campaign site after it ends?

Decide this before launch. Either redirect the pages to the closest relevant page on the main site, archive them with a clear note, or keep them if they still attract useful visits. Then close unused forms and hosting.

Next steps

Take your next campaign and run it through the checklist above before anyone opens a design tool. If a landing page on the main site will do, set up a reusable template. If you want help deciding or building, our website development team can advise, and you can contact us to start.