It goes to your 2nd and 3rd-degree leads. If someone already sent you a connection request, your agent accepts it instead of inviting them.
Add a note attaches a short sentence to the invitation: it helps people accept. Your AI writes one for each lead, or you write your own. The note goes out with the invitation, without approval. With LinkedIn Premium it takes up to 300 characters. Without Premium, 200 characters and only a few notes a month: past that, your agent sends the invitation without a note, nothing is blocked.
An invitation nobody accepted is withdrawn after 21 days.
If you turn the invitation off, your agent only writes to your direct connections.