The product, as sold, without any additional equipment, is simply useless. It cannot withstand even the slightest breeze. The legs do not anchor in the sand or on a rock, they do not have such construction.
The situation is somewhat salvageable, and you will need: 4 bases to place the 4 legs. Enough rope to tie the 4 corners, each one to at least a 10kg rock, to keep it stable. And string/rope to tie each edge of the fabric to the top of the base, so that the edge does not come out of the hole in the top.
Even in this scenario, where you spend about a quarter of the price and with the help of a second person, and it eventually stands decently, I did not test it in many windy conditions, and it seems quite risky, as the tent does not have any provision to release the air. In other words, I'm afraid that with more than 3-4 strong winds, it will "take us and lift us".
It goes without saying that there is no guide or source on the internet, and no matter which store I asked where they were selling it for more information before buying it, no one had the slightest idea.
The tent, if set up correctly, provides adequate shade for 4 people with towels, but it will be more cramped for 4 sunbeds.
The 4 legs seem poorly constructed, I doubt they will withstand more than 5-10 tent setups before falling apart. I consider the overall cost to be exorbitant, as with the 30 euros I spent (I wanted to buy it immediately from a physical store, my goodness), I can buy 3 square meters of nylon and 4 sturdy legs. The packaging is very small and convenient, a long narrow bag.
At least now the rest of you know, only buy if you are willing to do the above, and still with risky results for more than 3 strong winds. Otherwise, an umbrella with all its pros and cons..
Edit: The 3 square meters of nylon with the 4 iron legs are in the trash. Tragic even with 1 strong wind. It almost ruined my vacation. Make sure it doesn't ruin yours. Spend a little more, even double or triple, so that you don't become the laughingstock of the beach, nor envy the real shade structures you see around you.