@Anthony2345
If it states it is a 1 bedroom with 3 beds one wonders what the sleeping arrangements are? Can you tell from the photo the size of the bed in the bedroom, or how many beds in the bedroom? Airbnb allows Hosts to list sleeper sofas and air mattresses as "beds." This could be the reason for the lower price. It could also be this is a new listing and they have discounted their price to attract their first guests.
In the "Where You'll Sleep" section on the iisting it should indicate where the beds are and what type of beds.
As mentioned by @Elisa , I would send a message to the Host before booking and clarify with them any questions or concerns you have. This also documents your concerns on the platform should you need to work with Airbnb if you have issues upon arrival. If you book and find the listing description and photos do not match what you find when arriving, you can contact Airbnb and report that. Depending on the situation you may be able to cancel base on the fact the listing is not accurate. That said, if the Host doesn't answer your questions to your satisfaction, I would find another listing to book. Better to do that than worry about potential issues and not being able to find another place to stay last minute.