Epsilon shows the seller's location address and some location coordinates on the ad page. However, when you go to the Openstreetmap map, it is not clear what it shows in the city center. Tell me How to do when you click  "route map" ,  on the map show route from the user to the seller ?  in the Openstreetmaps module? Or Google Maps?

@Anle
Sorry it's not clear what you mean by "route map"

How to make the buyer's address or geolocation appear on the map in the first line, and if it is not enabled, so that it is suggested to enable it.
And in the second line was the address of the seller and the location of the ad if a specific address is specified in it ?

Please tell me how you can add the address from the ad to the second line on the map ? So that it could be routed from the buyer to the seller.

That is simple link to google maps using location (address) defined by user.