The Keep Internet Alive feature sends out a ping signal and try to fetch a small graphic from Google so the Hotspot service does not disassociate you after a period of inactivity and requires to you to re-logon again.
Note: Some Hotspot service may require you to re-logon at certain intervals despite activity.
Note: If you are on a time-based-quota Use-On-Demand Hotspot, do not use Keep Alive signal as it may consume your time quota, though such services are very rare nowadays.
In this option, select a time interval you want the EZhotspot Extender to send the life signal and click on confirm to effect changes.
confirm