Why do they show one google ads group for almost the entire budget?

Question

Google Ads

It shows one ad group for almost the entire budget, and for some reason only one keyword is shown from other groups, and in much smaller quantities than in the one on which the entire budget is spent, while setting the most effective ads is not worth it, and are worth alternating without time limits. How can this be fixed?

Answer 1

The explanation could be:
1) Low frequency of other requests. Perhaps they are too rare and users rarely ask for them.
2) Restriction on impressions for other requests or ads in other groups. Check the status of your ad impressions in the "Status" column.
3) Low rate on other requests. which is not enough for a sufficient number of impressions.