Please note that only Estatik PRO and Premium customers can use this feature.
Open your WordPress admin area, go to Estatik - Settings and make sure that you enabled ShelterZoom integration. Please enter the login details that you obtained in previous Step 1 in Settings like it is displayed below:
The field API Key will be generated automatically once you enter login and password. Additionally you can select the position of the icon and its size to adjust it better to your active theme.
Save settings once all the fields seem to be filled in.
Open frontend and check if you can see Offer Now yellow icon on the left or right side of the listing page: