I need to use the google map API on my Website and add some markers to this map but actually, I don't know if it's free or not and based on checking of pricing of Google MAP products, I found the following Url (https://developers.google.com/maps/documentation/embed/usage-and-billing) that mentioned that the Google MAP API is for free, so please advise if it's free using it with a marker or I need to pay and in case i used the Iframe instead of MAP API and create my own marker it's free or i need to pay?