Google Ads change history: how to find it, read it and its limits

Where is change history in Google Ads?

In Google Ads, open the Campaigns menu and click Change history. The page opens on the change overview, with three tabs:

• By user: the most recent change in the account and who made it.
• By campaign: the changes made to each campaign, including how many changes were made in a period.
• Performance: an overview of your performance with insight annotations.

To pick the period, select the dates in the upper right corner. Click the arrow next to a change to see its details: when a campaign was paused, who added a keyword, what the budget was before.

How do you see change history for one campaign, ad group or keyword?

There are two ways to narrow change history to one part of the account:

1. From the table: in the Campaigns menu, open Campaigns or Ad groups, tick the checkbox next to one or more items and click Change history in the blue bar above the table. The changes open in a panel on the right.
2. From the change history page: in the Views bar, select All campaigns, a campaign type, or click one campaign’s name.

For keywords, narrow the view to the campaign or ad group first, then filter by Change type to keep only keyword edits. The same works for budgets, bids, ads and status changes.

How do you filter change history?

Below the change overview table, filters narrow the list:

• Campaign and Ad group: one part of the account.
• Change type: budget changes, keyword edits and other types.
• User and Tool: the changes made by one person or through one tool.
• Item changed and Campaign experiment: the item that was edited, or one experiment.

Some filters have a second step: the date filter, for example, lets you choose a date range, a day of the week or a month. A useful routine: start the range a few days before the metric moved, look at budget and status changes first, then bids, keywords and ads.

Who made the change? Reading the user column

The user column shows the email address of the person who made each change in the Google Ads interface. Other changes show a label instead:

• Google Ads system (or a name such as ads-dartsearch-budget): automated or internal Google changes. Google says these are usually maintenance changes that don’t alter your active settings or performance.
• Google Ads API or a tool’s name: changes made through the API, for example by a third-party tool.

Google also notes that changes made by Google representatives during consultations may not all be listed.

How do you match changes to a performance drop?

Change history places changes on a timeline mapped to your account data (impressions, clicks, conversions, clickthrough rate and cost), so you can see whether a change lines up with a shift in results. Start the date range a few days before the metric moved, then check in this order:

A change on the same day as a drop is a lead, not proof. Check the same dates outside Google Ads before you call it, and see how to explain a conversion drop to a client for the client conversation.

Example: A client asks why conversions fell 20% on Tuesday. Change history shows the target CPA lowered from 40 to 32 on Friday; the team log adds a new landing page on Saturday. That gives you two leads, one inside Google Ads and one outside it, to test before you answer.

How do you undo a change in Google Ads?

You can undo most types of changes made in the last 30 days from change history:

1. On the change history page, find the row with the changes you want to undo.
2. Click Undo in the User / Date & Time column.
3. Confirm with Undo in the pop-up. The column then reads “Changes undone”.

If a row lists several changes, Undo reverts all of them together. Some changes can’t be undone, for example when a related item was removed or someone already undid the change; those rows read “Changes can’t be undone”. For older changes, make the reverse change by hand and log why.

What doesn’t Google Ads change history show?

• Anything older than 2 years. Google says data older than 2 years won’t be available, so year-over-year audits of older periods are not possible here.
• The reason. You see that a budget went from 100 to 120, never why, or what the team expected.
• Changes outside Google Ads. A landing page release, a GTM publish or a CRM form change that broke conversions won’t appear.
• Full detail for large bulk changes. The page limits the details shown per entry. Google recommends smaller changes, ideally affecting fewer than 2,000 entities, to see every detail.
• Some account-level settings and password changes. Some account-level settings may not be listed, and for security, password changes aren’t tracked.

Google’s help pages for change history don’t describe a download. For a programmatic copy, the Google Ads API has two narrower sources:

How do you keep a record beyond Google Ads?

Use change history for the fine detail, and keep a marketing change log for the team record:

1. Log changes that can move a number (budgets, bid strategies, new campaigns, conversion actions) when you make them, with one line of why.
2. Put website, tracking and CRM changes on the same log, so they sit next to the Google Ads changes on the same dates.
3. Once a month, skim change history for changes no one logged (automated rules, scripts, recommendations applied by others) and add the important ones.

In Changeline, each client gets one timeline and the Google Ads changes sit next to Meta, website and tracking changes. Connect Google Ads read-only and Changeline imports budget, bidding and status changes every 6 hours, then keeps them after the API’s 30 days and the 2-year change history window.