Amazon ad page

1. Force close Safari application. https://support.apple.com/en-us/HT201330

2 Clear History Caches and Website Data. https://support.apple.com/en-us/HT201265

3. Settings > Safari > Search

Turn off Search Engine Suggestions,

Safari Suggestions,

Quick Website Search

and

Preload Top Hit.

4. Highlight and delete the entry in the Safari’s search bar.

Press spacebar key on the keyboard twice.

Enter the URL for the site manually and then “Go”.

Test for a while.

Repeat step 4 for all sites that manifest the problem.

After a while, re-enable those disabled Safari search options.

https://www.youtube.com/watch?v=NDeb7XGaiWc

Force quit Safari from the  menu and reopen with the shift key held down. If that doesn’t work, disconnect from the Internet, delete the web site from History,open Safari, and then reconnect to the Internet. See link for other suggestions.

Safari -Tech support scam pop-ups