Razor Pages is used for server side web applications, just like in the good old days.
Blazor is aiming to provide an alternative to popular JavaScript frameworks (like Angular or React), to create Single Page Applications (SPAs) which runs (mainly) in the clients browser.
However, I have also heard about server-side Blazor, which kind of confuses me. According to this answer, server side Blazor is just Razor Components running on the server. But what is the difference between Razor Pages and Razor Components?
Note: I am not trying to figure out which is better or "the right choice". I am simply trying to figure out which technical differences there are.