@Emmanuel1577 Actually, the pictures need a TON of work. There is so much repetition in the pics, so many duplicates, I couldn't make it through all of them. I also have NO idea how big or small your flat is, how the rooms relate to one another, and basically anything else about the space. You need somewhere between 20-30 pics.
It started with about 10 pics of your living room(?), and I still have no idea how big or small the space is (it looks very small).
Most of the pics have no captions- use the captions! Take pics of the whole room!
In the About This Space area, describe the space. The actual space! Not the neighborhood or the age of the building. Describe the bedrooms and living space, and where they are in relation to one another.
Use the captions with the pics so guests know what they are looking at. And think about capacity. Do you really want 6 guests in there? Higher capacity isn't always better.
You also have no check-out time listed.
You would benefit from looking at some other listings in your neighborhood that have good ratings and solid bookings, and mimic some things from their listings, adapted to your own.
Good luck.