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Well, the advantage of having sub-domain is that you can target a specific audience with that specific sub-domains since Google'll treat it as it's won unique site. The biggest disadvantage is that if you don’t do it right, you will not get the expected results you could even draw traffic from your main domain.

.... each of your pages/articles would still be focussing on a single keyword (or keyword cluster) while bearing in mind the overall goals. You are 100% correct.  They are all about the same long tail keyword with even longer long tail keywords as variants. You wouldn't have two pages competing for "Stihl Chainsaw MS170 Maintenance" for example, but you might have multiple pages that are talking about "Stihl Chainsaw MS170" in various ways, all probably linking to the page where the customer could buy the actual product or parts, etc. You are right.  And, those pages linking to one another will support the attack on "Stihl Chainsaw MS170"... and all of them plus all of the pages for other models will support the attack on "Stihl Chainsaws".

I think I have the same question. I was just going to ask it less intelligently. Our gated content always takes the shape of a PDF form on Hubspot. What are the best practices for getting some SEO benefits from the Case Studies and white papers that we gate? (In case anyone is interested, here's a landing page where you can see what I mean: https://www.cockroachlabs.com/case-studies/mux/) Thanks everyone!

Great, thank you !

thanks again!