Below is a description of how it works on a desktop computer. On a mobile phone, it is slightly different, and you can only see the map but with less information. I did not manage to see the monthly overview on my mobile phone.
You start by searching accommodation for a given date in a given town, for example
Burgos and
Friday 12 November. You click on
Search. Then, in the list of available hotels, you choose one hotel and click on
Show on map. In the window that opens, you click on
show map again. You now see the map with the hotels in the area that are on Booking.com, you see whether they have rooms available on Booking.com or not, and the minimum price of a room for each hotel on the map. This is information for the day that you had chosen. You can close the window with the hotel info to get a better view of the map. You can zoom in and out.
For the monthly overview, you start as before, choose a hotel, click on
Check availability, scroll down, and then click on the fields marked in the screenshots below. You see an overview of the minimum price of the chosen hotel for the chosen month and the following month. Left and right arrows allow you to see the monthly overview for other months.
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