What's a Land Acknowledgement?

"i don't think i have a strong opinion but i also am interested enough in it that uh that it's the thing to talk about right and that's i guess yeah i think it's more complex than it seems is interesting right right?" she says. "I mean sort of like mrs. I want to hear all about this and i'm not gonna say a word because yeah right like this is not my area of expertise or passion or i don't know i don't really allowed to have that much of opinion first well"