although there are telegram groups that provide good information for signaling a coin, it's best to study it yourself. no matter how good the offer is, sometimes people will sue them when they get a loss from the signal. to be honest, there are lots of telegram groups like this one, only, we don't know if it's a scam group or not, and even when it's free, most of them just provide information on pure speculation without data. personally, I really avoid such groups.
Those free ones are basically just what the owner is thinking and nothing more. If you think that you could make something out of that, then I have a very bad news to you regarding those. I know that you agree with me, but there are some people who think that they are really good.
Reality is that we are talking about a place where some guy sees something and says "hmm I think this will go up" and then writes to the group as a "signal" after he bought some of it and hopes that people would buy after him and the price would go up because of it. You will see that most of those places offer small cap stuff because they are looking for the group to pump it as well.