I am now opening my business again, but with a better domain. I feel it will pay off in the long run, especially looking at the domains of the competitors. I have the old domain 301 redirect to the new domain. Two weeks in I'm 15 in the SERPS with the new domain.
I am building link to the new domain. Is there any benefit to building links to the old domain too? What about the similar domains I have registered? I know I need to 301 redirect those to the new domain, but should I build backlinks to those other domains too? Or is this overkill that will backfire?