Yandex robot recognizes the standard HTTP 3xx (redirection) status codes.
These are the main kinds of redirection:
301 — permanent redirection;
302/303/307 — temporary redirection;
redirect using Meta refresh (META HTTP-EQUIV = "REFRESH") with small delays is regarded as a temporary redirection.
In-host redirection is the redirection within the same host (FQDN). Host-to-host redirection is the redirection to a page residing on a different host.
a.com/ -> a.com/index.html www.a.com/index1.html -> www.a.com/index2.html
a.com/index1.html -> www.a.com/index2.html a.com/index1.html -> b.com/index2.html
If one web page (the source) redirects to another web page (target) within the same host, the robot will index the content of the target page, but the search results will in some cases display links to the source, and in some cases, links to the target.
If permanent redirection (301) is used between internal pages of the host, the search results will display the target page.
a.ru/page1 ->301 a.ru/page2
If temporary redirection (302/303/307/Meta refresh) is used between internal pages of the host, the search results will display the shortest of the two URLs.
a.ru/33/ ->302 a.ru/index.php?id=33 b.ru/temporarypage/ ->302 b.ru/page/
The main page of the host is always displayed in the search results.
a.ru/ -> a.ru/innerpage a.ru/innerpage -> a.ru/
They will appear in search results if you set a 301 permanent redirect from the old pages to the new pages.
The information shown in search results will be updated later, after the Yandex robot indexes the redirect source.
Set 301 redirects from a.ru/page to a.ru/page/.