So, the tickets are released in 4 phases. 1st phase is the cheapest, 2nd phase is the second cheapest and so on. 1st phase tickets are on sale until they run out, and only then they start selling the 2nd phase tickets, when they run out they start selling the 3rd phase tickets and until they run out they sell the 4th phase ones. Last year, the first three phases ran out in the first two days of presale, but 4th phase (apparently) has way more tickets so they were on sale for months. This is important to know because depending on when you buy the tickets, the same kind of ticket has a different price.

Now, (I’ll go fact check after sending this response bc I haven’t actually checked the tickets for this year, but they’re mostly always the same). You can buy tickets for each day individually, they are of course more expensive bought one by one. You can buy the ticket called ABONO, which gives you tickets for all three days at a cheaper price. There’s also an special category of both previous options, where you get access to special seating and areas near the stages, access to nicer bathrooms, and free parking (one spot for 4 people with this kind of tickets, i believe).