I have a web design and development agency. Assume that domain name is example.com.
- I have plan to publish new tools like IP checker, Grammar checker, Domain Age Checker.
So I thought to use tools.example.com for those tools.
- I have plan to start a community like inbound.org, bizsugar.com for bloggers, webmasters .
So I thought to use web.example.com for that community.
And there are many ideas.........................
If I use same domain with sub domains it is easily for me to manage. And I don't need to create separate email address and I don't want to renew multiple domain. So I like it.
I saw some disadvantages (I am not sure those are correct).
If one sub domain has low quality posts, is it affect for my main domain also?
If Google penalize for main domain or sub domain is it affect for other sub domains?
So my question is, for my requirements,
Is it ok to use 3,4 sub domains or use complete new 3,4 domains? What are the advantages and disadvantages?