Unity Assets go where?

Newbie here,

downloaded: Unity 2020.1.10f1 (64-bit)
got that going ok.

Went to the asset store and downloaded and installed
a couple assets; and they do not show up in unity.
where did they go?

just looking for terrain to get started.

Window>Package Manager>Packages: My Assets
Then search and import

Thanks, interestingly; I found the items I was looking for, but had to re-import them, but had to de-select all toggles and then re-select all toggles; then import. I think it worked.