I do SEO for a clients site but am noticing that a number of 404 URLs are being created that end with the below URL string. There are no vendors as the products are made by the client. I am unable to find these collections to remove, delete or redirect them.
URLs also contain clients website name in both capital and lower case.
collections/vendors?page=1&q= website (replaced website name)
collections/vendors?page=2&q= website (replaced website name)
Could be wrong but I've never seen those URLs with /collection/vendor before dont think that exists in Shopify. Maybe some weird broken redirect from old URL before they moved to Shopify?
If it were me I would start looking into if there are any refererrs in GA, might give you a clue what's happening.