Compare the keywords getting impressions with the ones getting none. There may be a difference in competition or targeting.
either the target price per conversion is set, or per click, maybe the price per impressions, there is definitely a limit somewhere.
If the campaign uses automated bidding, the bid strategy and its targets can affect how much it spends.
will start from the keyword match types bids geographic targeting and bid strategy i will also check impression share and campaign diagnostics to understand what prevents traffic generation.
First, check the keyword traffic volume, then review the bids and assess the level of competition; optimize the ad to maximize its priority ranking before proceeding to add more keywords.
