Hi I am sorta new to this community. I want to know how I get asset packages?

I have been watching a a couple of tutorials the microsoft Visual Studio channel is good because nobody swears or dose any lame memes as they are teaching you.

I have been watching (2) https://www.youtube.com/watch?v=sqkCVb4nJ5w Building your first Unity game and the woman instently go's to her unity and clicks on asset packages and instintly has some asset's to choose from but I do not have any? I want to know how do I get a asset packages?