You are:
Have you moved to HTTPS?
Have you wiped out old pages and products?
Have you added a filter or facet to your e-commerce site that creates a new URL for each selection?
If any of these are not handled correctly, it may indicate a potential problem.
Pop-up
Earlier this year, Google announced that it would penalize the site for using "intrusive interstitial." These are large pop-ups that make it difficult to access the content of your page. If you have one of these, consider how it will affect your ranking ability.
Change pages or navigate websites
Migrating to HTTPS, changing websites, and erasing old pages can all cause problems if the old link isn't properly redirected to the next most relevant link. Check the webmaster tools that have 404 errors and use tools like Screaming Frog to identify other issues (the first 500 URLs are free). The search console also tells you if a manual penalty was passed in the message section (in this case, the ranking doesn't go down and disappears overnight). Marketing Services Director Ben Wood has created a helpful guide for migrating from HTTP to HTTPS. This is useful if you think this is a problem.
It provides developers with a list of old pages and introduces them to the appropriate new pages. This saves some of the Cork Bicycle Repair Zone fairness of the links you've built over the years by ensuring that they are passed to the new structure. You need to make sure that the canonicals or hreflang tags also follow the new URL structure.
Navigation filters or facets
If you add a filter to aid general navigation on your e-commerce website, a new URL will be created each time the filter is selected. If this is a recent introduction, here are some tips on how to handle these particular issues.
3) Check the backlink profile.
Since the introduction of the "Penguins" update in 2012, Google has opposed links built to manipulate rankings. Webmaster Tools will give you an idea of where your external links are coming from. At a glance, you may find some that do not represent your site in the best light.