> Anyway the old domains won't get any new attention if you don't work on that and then you can just can work on your main domain.
It doesn't have to get any attention. Links (or a redirect, or other things) from it will still (massively, depending on the quality of the domain) improve your ranking.
You could also throw some unrelated content on it, and will likely rank for quite a while until somebody complains loud enough that Google manually sets up a -100 on your domain.
It doesn't have to get any attention. Links (or a redirect, or other things) from it will still (massively, depending on the quality of the domain) improve your ranking.
You could also throw some unrelated content on it, and will likely rank for quite a while until somebody complains loud enough that Google manually sets up a -100 on your domain.