As a mobile user, you can use ArcGIS Earth to quickly add placemarks and save them as a .kmz file for sharing.
Add and edit placemarks
To add and edit placemarks, complete the following steps:
- Tap the Toolbox button
at the bottom of the screen and select the Add Placemarks tool 
. - Tap the add button
to add
a placemark. You can change its name, adjust its location, update its symbol (including icon, color, and size), and attach descriptive information to the placemark. - Tap the Remove button
to remove the selected placemark. - Tap a placemark in the scene to open its pop-up. Choose Edit to edit its properties or choose Share to save it as a .kmz file. Tap the Navigation button
to redirect to a third-party navigation app.
Note:
ArcGIS Earth supports getting directions using navigation apps installed on your mobile device, such as ArcGIS Navigator, Google Maps, and Apple Maps.
Share placemarks
Placemarks can be managed in Placemarks 
. You can control the visibility of your saved placemarks and delete one or all of them by tapping Remove. To share your work, tap Share to zip all placemarks as a single .kmz file and reveal the sharing options. Tap the Share KMZ button 
to share the placemarks using local apps. Tap the Upload button 
to upload all placemarks to ArcGIS Online or ArcGIS Enterprise using a signed-in account. Later, you can add the .kmz file to ArcGIS Earth on your desktop and continue editing from where you left off.