How to fix problems after setting up a search campaign

After setting up the search advertisement, exposure to the top publication is active for 10 minutes.

But after about 10 minutes, it converges to almost zero.

Anyone who has experienced this or knows how to fix it, please advise.

Hi there, Since I don't know all the details of your account it will be hard to provide an accurate solution but here is what generally works in this case
1) Try increasing the Ad Copy Quality to Excellent ( also use Dynamic Keyword Insertion if your are not currently)
2) Increase Bid for the keyword