The acceleration is too long for target actions

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And one more thing. Even if you have collected the ideal LaL audience, after some time it will become outdated, and the process will have to be repeated.
At the beginning of the advertising campaign, you need to set aside at least 3 weeks for its acceleration. If you want the result to be visible faster, use master campaigns. If the first month does not show sales growth, do not be upset. This is a normal situation. Test your advertising campaigns, audiences, gradually switch from payment per click to payment per conversion transition.

Fierce competition in search queries
If the company is small, we do not recommend USA cell phone number list going to Search. It is better for brands that are well-known to go there. It is better to pay attention to YAN .

The campaign has dropped sharply
If there is a campaign slump, try other payment strategies, optimize ads, adjust them. You can disable a campaign that turned out to be ineffective. By the way, it is possible that the result will appear after it is disabled.

You can also try rebuilding your campaign. This may trigger different algorithms and show your ads to new people.

What else is worth doing:

Don't throw in large sums at once, but increase your investments little by little.
Analyze the report master and get rid of keywords that turned out to be ineffective.
Systematize your actions, constantly analyze the results of the advertising campaign and optimize it.
And don't forget that it takes time to scale successful campaigns and test their performance.