google-ads-ip-exclusions

Rarely. Exclusions work well against a known offender on a fixed address and they cost nothing, so they are worth setting up. They do nothing against traffic that changes address, and they are unavailable in Performance Max. If your wasted spend has not moved after adding addresses, the list is working correctly on a problem that was not the expensive one.

It can. An exclusion blocks everyone behind that address, not one person. Office networks put dozens of staff behind a single address, mobile carriers route large subscriber groups through shared gateways, and residential addresses get reassigned between households. Any of those can take genuine prospects out along with the clicker you were aiming at, so confirm what sits behind an address before you add it.

No. IP exclusions are a campaign level setting, so an address blocked on one campaign still sees ads from every other campaign in the account. There is no native account-wide exclusion list and no built-in way to copy one list across campaigns. Advertisers running many campaigns either repeat the work by hand or push the lists through the API with a script.

No. Google Ads does not expose the IP address behind a click anywhere: not in the campaign interface, not in downloadable reports, and not through the API. To build an exclusion list you need a second data source, usually server logs or a tracking layer that records the visit and ties it back to the ad click through the click identifier in the landing page URL.

Google Ads allows up to 500 IP address exclusions per campaign. Ranges count against that total too, which is why most advertisers use them rather than listing addresses one at a time. The ceiling is hard. Once a campaign is full, adding a new exclusion means removing an existing one, and the limit applies per campaign rather than across the account.

Open the campaign you want to protect, go to Settings, expand Additional settings, then open IP exclusions and enter one address per line. Save and repeat for every other campaign, because exclusions are stored at campaign level rather than account level. Google accepts single addresses and ranges. It does not verify that the address you entered is the one clicking your ads, so check your source data first.