How to correctly implement redirect between your pages on the site?

Question

Web development

Tell me how to implement a correct redirect between your pages on the site so that they are normally indexed by search engines?
Found two examples:
http.Redirect(w, r, "/login", 301)
and
http.Redirect(w, r, "/login", http.StatusFound)
http.StatusFound as I understand it 302 redirect, found in the description https ://golang.org/src/net/http/status.go

Answer 1

Get PCI DSS Certified

Answer 2

The easiest way to form yandex .
Create a form with fields (name, title, etc.). It redirects to the payment page. You receive a report from the service using the link that you specified during the settings.

Answer 3

http.StatusMovedPermanently if your redirect is permanent (301)
http.StatusFound if your redirect is temporary (302)