Sometimes we face difficulties in downloading apps from Google play store .
To solve this problem you must check out some of the tips .
Check your internet connection as the way of download apk is not by wifi .
There is no option of downloading multiple apk once at a time in play store . If your app is showing pending then it might take some time to start the download or there may be an existing apk is downloading in background.
You can clear the cache of the play store
by moving to settings of the play store this can reset the data of the play store .
After clear the cache select the google account in the play store and reboot the device .