Click the three lines in the top left.
Click "Settings"
Scroll to the bottom of your "Settings" menu and click the "Enable KML Import" button.
You can now import KML files from your computer or a Google Drive folder under the "My Places" button.
The video to the right can walk you through the process.
Press the "My Places" button on the left.
Click "Import KML File"
You can either upload one from your computer OR import one from a Google Drive folder (recommended).
Once the file is located, click to view it in Google Earth.
Open the Google Earth app on your mobile phone/tablet
Click "My Places"
Select "Import KML/KMZ File"
Find your Google Drive , locate the folder, and select the KML file you wish to view
That's it!