Is a resource linking page a good way to build backlinks? Do I need to ask permission of the site I am linking? & If do build a resource page do I have to keep in mind keyword density rule, not to stuff too many links on page? I see one of my competitors using a "resource page" and linking to some high athority sites, (which I know they have not asked permission) b/c they are big name site, NFL, NHL, ESPN etc.
Any suggestions much appreciated!
Thank you!!!