My son got this kind of thing from a fair number of schools when he was in HS. I think you can take more from this than a camp invite, but I still wouldn't overestimate it.
We got the sense that some schools are pretty aggressive at compiling a list of "potential recruits." But the list of potential recruits is, I suspect, far larger than the list of guys who will actually be recruited. No harm in filling out those recruitment forms, sending transcripts, and seeing where it leads. But that's just a first step. Mine actually had a few extended flirtations with three or four schools that began with this kind of request. For one of these schools I'm pretty sure the transcripts --- which were not his strong suit -- ended it altogether. In two other cases, with less academically competitive schools, the schools both eventually saw him play -- one of them several times. The other school even wrote back to ask if he was still unsigned after they lost out on somebody who was evidently ahead of him. They said they were eager to see him play again to see if he might be the OF they were still looking for. Would have been a great opportunity, but unfortunately, he was injured at the time and remained shut down until the start of the HS season. So in the end nothing came of it.
Point being, it's a long process, with many twist and turns. Being invited to submit transcripts/fill out a prospect form etc. can be a start, but only a start.