A 301 redirect is a special kind of redirection that indicates the permanent moving of a web page or website to another.
Example: mashinie.com redirects to digitalkube.com
The ‘301’ part of the name refers to the HTTP status code for this kind of redirect.
In simple terms, a 301 redirect instructs the browser that this particular page has moved permanently to a new location. So take the user there.
How does it affect SEO?
A 301 redirect passes between 90-99% of link equity (ranking power) to the redirected page. So, you won’t see much of a difference in your rankings after the redirection is made.