I have been attempting to redesign and implement SEO on the main website for a business owned my a relative of mine and haven't had a lot of success. I believe this may be because (in addition to the fact that I am a beginner at SEO) they have several other websites for the same brand selling the same product (furniture removals). Each of these websites is for a different town and none of these are doing particularly well in the search engine results.
Will their main website which I am working on be down ranked because of these additional websites? Or does it not matter?
I would really appreciate some clarity in this so I can start blaming myself or get rid of these sites!