This is FYI for the group struggling with this SPAM issue…
I was doing some research over on the Google Search Central Help Community. Apparently, this issue is quite widespread and also is impacting Wordpress sites in addition to Shopify stores.
Once of the threads over there had a link to this article which may be helpful: https://yoast.com/internal-site-search-spam/
The phenomenon seems to be called “internal site search spam”.
The Yoast article is interesting in that is describes what many Shopify store owners are seeing.
Additionally, the article states “Yoast SEO automatically applies a noindex directive to your search results page, which keeps these URLs out of Google.”
I noticed there is a version of this tool for Shopify. Could this be a possible solution?
I am not familiar with Yoast or endorsing it but wanted to pass on the info.
And… is the noindex directive something Shopify could implement on their end?
Thanks