Website Migration Checklist For Google Ads

A website migration is one of those moments where everything looks fine until performance suddenly drops. Leads slow down, cost per conversion increases, or Google Ads stops behaving the way it used to. In most cases, the issue is not the advertising strategy itself, but what changed underneath during the migration.

This checklist exists to prevent exactly that.

When a website moves to a new domain, CMS, URL structure, or undergoes a major redesign, the relationship between your website and Google Ads changes. Landing page URLs update, conversion tracking can break, consent signals may reset, and historical learning can be disrupted. If these changes are not identified and managed in advance, campaigns that were previously profitable can lose efficiency very quickly.

This page is written for business owners and marketing managers who are responsible for revenue and growth. You do not need to manage the technical migration itself. You do need to ensure that Google Ads performance is protected before, during, and after the transition. That is where this checklist fits in.

Who should use this website migration checklist for Google Ads?

This checklist is relevant if Google Ads plays a meaningful role in your acquisition strategy and you are planning or executing:

A domain change or domain consolidation
A rebuild in a new CMS such as Shopify, WordPress, or a custom platform
Structural URL changes for products, categories, or landing pages
A redesign of pages that receive paid traffic
Changes to analytics, consent, or tracking setup as part of a broader migration

Even if a developer or web agency handles the migration itself, the impact on Google Ads remains your responsibility.

When should you use it?

Timing matters. The checklist is intentionally structured around three phases: before migration, during migration, and after migration. Most performance issues arise because checks happen too late or are skipped entirely.

Before migration, the focus is on documenting what currently drives results. This includes active landing pages, conversion actions, feeds, audiences, and tracking dependencies.
During migration, the emphasis is on continuity, including redirects, live validation of conversion tracking, and ensuring ads still point to valid and compliant destinations.
After migration, the checklist helps confirm data accuracy, learning stability, and performance trends in Google Analytics 4 and Google Ads.

Tip: Please don’t migrate on a Friday afternoon, only to find issues on Monday 😉

How to use this page

The table below is intentionally practical. Each item answers one key question: if this breaks, will Google Ads performance be affected? If the answer is yes, it belongs in your migration plan.

At Adcrease, we use this framework to safeguard Google Ads results during website changes. Not by managing the migration itself, but by ensuring that paid media performance, data integrity, and learning continuity are protected at every stage.

Website migrations do not have to put growth at risk. With the right checks in place, they can happen without unpleasant surprises.

A practical pre-launch and post-launch template for webshop migrations, focused on tracking, GTM/GA4, Google Ads, and Merchant Center continuity.

Please find it below.

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