Add keyword to My Maps Location's maps

Hi, i need to use an article, where one of my My Maps Location's map is embed, as Google Ads's landing page. Each marker of this map ( https://cistite.info/medici/medici-consigliati.html ) is linked to an article which is not written using My Maps Location (i'm using custom link/destination inside Marker settings).

How can add keywords to this map to suggest Google Ads i'm using a good landing page related with the keywords i buy to publish my ads?

Marker settings