Very useful guide. I receive warning today,in which exactly post or posts so that i can improve?
You have not received just one warning, you have received a total of five warnings.

The reasons, as you see, are varied. But today's warning is due to this post (already deleted) without any sense:
The appearance of sexuality spoils the detailed content of the crypto world, which really has something to learn, read, make something new out of it as inspiration, such as a new project or becoming part of a team. I don't devote my time to such conspicuous things, as I said before, I don't like it. There is less fraud than last year, which is a sign of a good direction.
I have waited almost 48 hours for you to edit your post, or explain if it was some kind of error, but you haven't done anything until you've seen the warning.
As for your question about which posts you can improve, the answer is all of them. But improving your posts does not mean that you put more words without any meaning, it means that your posts are coherent with the topic at hand. The warning will disappear, if your posts improve, we will see what we can do about the strike after a few months.
And remember, don't be in a hurry to reach the next rank, as you see, it is a double-edged sword.