What parameters are added to links (yhid, ggep_is_embeddable)?

Question

Search engines

Good afternoon.
In Yandex, there are many links to site pages with "tails" with parameters:
Type 1:
yhid=262466207254016127 Type

2:
ggep_is_embeddable= false /?text=yhid%3D26246620... ), including large sites. Has anyone come across? What is it? Where do such requests come from?

Answer 1

It is necessary to block the left tails. So that 404 is given when trying to access such a link.

Answer 2

The first type of "yhid=" tails are Yandex Direct markup tails.