Building shared negative keyword lists that actually save time
Every Google Ads account needs negative keywords. Most accounts manage them at the campaign level, adding negatives reactively as irrelevant terms appear in search term reports. Shared negative keyword lists change this from a reactive task to a proactive system.
A shared negative keyword list in Google Ads is a list of terms that you apply to multiple campaigns simultaneously. When you add a term to the shared list, it is automatically excluded from every campaign that uses that list. This is the difference between maintaining negative keywords at scale and being overwhelmed by the task as accounts grow.
The three list types every account should have
A business exclusions list covers terms that are fundamentally irrelevant to your business - job-related terms if you are not a recruiter, DIY versions of your professional service, educational or training terms if you sell the finished product rather than the training, geographic areas you do not serve. This list rarely changes and applies to virtually every campaign in the account.
A competitor and brand protection list covers competitor names you do not want to appear alongside (unless running explicit competitor campaigns), and your own brand terms in non-brand campaigns to prevent traffic mixing. Review this quarterly as competitors enter or exit the market.
A search quality list covers the terms that consistently appear in search term reports without converting - informational modifiers like "how to", "what is", "definition", "history of", unless these are specifically relevant to your campaign intent. This list grows over time as you review search term data and should be reviewed and updated monthly.
Building lists from historical data
If you have an existing account with search term history, the fastest way to build initial negative keyword lists is to export twelve months of search term data, filter for terms with zero conversions and meaningful impressions, and categorise them into your list structure. This baseline list prevents you from paying for the same irrelevant traffic that the account has historically attracted.
The maintenance discipline
Shared lists only stay useful if they are maintained. Schedule a monthly search term review where you add newly identified irrelevant terms to the appropriate shared list. The review takes 20 to 30 minutes for most accounts and prevents the gradual degradation of account quality that happens when negative keyword management becomes purely reactive.
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