My company operated with "domainname1" for several years.
The company wanted to rebrand itself from "domainname1" to "domainname2"
"domainname1" had been experiencing strong traffic growth through the first half of the year.
For the name changeover, initially, the the organic search results would name "domainname1" and then when a user clicked, they would be redirected to "domainname2". If a user directly typed the "domainname1" URL they were redirected to "domainname2".
A lot of the website's traffic comes from organic search on Google.
The webmaster then took down "domain name 1". Google organic search traffic plummeted. It's been four months and it has not recovered at all.
If I do site:domainname2 on google, the site is fully indexed.
I'm sure this is an incomplete description since I only know the basics of SEO, but from my description, can anyone help with what we should be asking of our technicians or checking to diagnose root cause? The answer I'm getting is that google "sees" the site as brand new, and has penalized it in the rankings accordingly. Somehow, I'm feeling there must be more to it than that since we did the inital redirects for several months, and it has been several months since the cutover with no improvement.