Is it possible to store geodata in a database?

Question

JavaScript

Can you please tell me if this is possible?
It is necessary that when entering an arbitrary address, it would be displayed as a label on the map, and in the drop-down list, options were offered for choosing from the possible ones from Yandex maps. As a result, the label can be moved manually to correct the coordinates. At the same time, labels of addresses stored in the database and located in proximity are shown on the map (proximity is configured by a parameter). Sample below.
The main thing I need is that at the end of the selection, the coordinates are sent to the server for saving. Help me please.