Hi
To find what exactly is the problem, you need to Check the following issues:
1) Site Loading Time ( Mobile and Desktop)
2) Content Optimization
3) Content alignment
4) Keyword stuffing
5) Any Popup Offers in Past
6) How many times are you Using “Free” word in your Product pages?
7) Check the ranking of your targeted keywords.
8) Any 301 redirection Issues
9) page not found Issues
10) Use free tools like Moz or SEMRush for onsite optimization to find out what other issues might be creating the problem.
Regards
Joanna Goodwin
Marketing Manager
Optin Contacts Inc.