Google Can Forward Ranking Signals Without A 301 Redirect
Google is capable of forwarding ranking signals from one URL to another without a 301 redirect in place.
Google’s John Mueller says, in some cases, it’s possible to forward ranking signals from an old URL to a new URL without a 301 redirect.
This is mentioned during Mueller’s weekly Google SEO hangout recorded on June 4.
A site owner submits a question, noting that they’re working on a site that’s changed a number of URLs without adding 301 redirects right away.