What is advisor role in a startup and how to get one

I see bunch of top tier folks have advisor position in a few start ups on their LinkedIn profiles. What does the advisor actually do? How much involvement does it require? How one would get such position? YOE 12 / TC 700k

Amazon xwQY40 Apr 8

I have never seen one of these profiles. How top tier are we talking about?

LinkedIn wJfE41 OP Apr 8

One of distinguished engineers I work with for example has like 4 positions like that

Amazon xwQY40 Apr 8

Oh distinguished engineer is a distant dream for me. Tell me if you see any senior sde/sde3 in such roles.

Affirm focnwl Apr 8

You have to have a background with prestige and nepotism