Today I noticed in one account interface a message that if ignored could radically change how often ads are triggered and for what keywords. I thought they had a similar match type already implemented called “extended match,” but this possibly takes the liberty at which Google will trigger your ads for search (related and sometimes unrelated) queries even further.
According to Google:
“Automatic matching is an optional feature that helps your ads reach targeted traffic missed by your keyword lists. It works by analyzing the ads, keywords, and landing pages in your ad group. It then shows your ads on search queries relevant to this information.