In 1.30.1 theme version, we have made the IDs visible in admin section.

We added this for properties, taxonomies, agents and posts

The Ids are mostly used in shortcodes like Recent Items,  Featured Agent. Featured Property or Recent Items for posts and many others.

Now you can find them in admin in lists:

These is the IDs that needs to be added in shortcodes.

For properties:

For Taxonomies:

For Agents:

For Posts: