: Should Good Content Strategy Possibly Create Multiple Domains? [See the notes below about duplicate questions.] We have a friend whose site sells different types of things-- rare coins, jewelry,

[See the notes below about duplicate questions.] We have a friend whose site sells different types of things-- rare coins, jewelry, fine art, antiques, etc. For SEO reasons (creating a high-quality information site about each market/topic), we were wondering if it was better to keep this all together as one site, with a somethingcoins.com type URL (and so jewelry would be somethingcoins.com/jewelry), or whether we should create a separate somethingjewelry.com and target that whole site on jewelry products and related information, to be an authority in that one jewelry market.

So I guess the question is, for Google rankings, is it better to have multiple small sites which are each focused on a single topic/market? Will this lead to higher authority for the site? Or should we continue to group them all (like somethingcoins.com/jewelry) and trust that the aggregate number of inbound links and overall site authority will be better this way? It also seems more difficult for somethingcoins.com/jewelry to compete against other sites that are targeted/focused on jewelry only (or am I maybe wrong about that?).

RE: DUPLICATE QUESTIONS. I know there are other questions here about multiple domains, but those seem to be asking how to redirect multiple top-level domains into a single site, or to show a single site's content on multiple top-level domains, possibly in different languages, but all assuming that the site content itself makes sense as one collection of pages. Our question here is different--- mostly asking if their current collection of coins, jewelry, art, etc, makes sense to group together on a single site if we're trying to create an authority site for each of those markets. Thanks so much for your feedback and ideas.

UPDATE #1 re: DUPLICATE QUESTIONS. I should clarify that I'm not suggesting multiple domains like buygoldjewelry.com, buycheapjewelry.com, etc. which is the focus of the linked "Duplicate" question above. I agree with the advice on that question, that Google wants you to build a brand. But aren't BrandCoins.com and BrandJewelry.com two completely separate sites, target audiences, and markets? Each can be a solid information site for the particular market, since they are very different (rare coins vs. fine art, for example). Or more importantly, doesn't combining these all to just Brand.com/coins and Brand.com/jewelry actually LOWER the authority of the overall site in each category, when it competes against other sites focused on ONLY jewelry, for example?

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