“Places” is a custom post type created by the QT Places plugin, which comes in bundle with the theme.
Places are basically “venues” and they can be associated to the events to create event maps. You can optionally create simple “places” maps to display any tipe of geolocated content.
This plugin is very powerful and allows you to create maps of every type of content, even simple posts.
Important: this plugins requires Google Maps API Keys, visit Settings > QT Places and follow the instructions.
To understand how it works, please check its own documentation, download the PDF manual of QT Places here.
Official plugin page link.
IMPORTANT NOTICE
Starting on June 11 2018, you’ll need a valid API key and a Google Cloud Platform billing account to access the core Google Maps APIs. Further information on this page.