Facebook Lite has actually been around since 2015; however, was only available in other countries where mostly 2G networks were the norm. It has now been released to over 100 countries, including the United States, and is geared to run on older Android devices where memory and storage could be an issue (if you installed the full mobile version of Facebook).
When I hear the word “lite” I have to try it out. My theory is that if it is designed to run on older smartphones, Facebook Lite should fly like an eagle on a newer phone.
For testing purposes, I installed Facebook Lite on my Motorola Moto G Plus (5th Generation), 64 GB Storage, 4 GB RAM, which is a mid-range modern smartphone, to see if in fact it would fly like an eagle.
End Result: It flew like an eagle and I am definitely keeping it installed on my smartphone. From what I can tell, it will do everything I need it to do when it comes to Facebook… I say give it a spin if you are finding that the full install of Facebook is causing your phone to slow down or you want to fly like an eagle on your new phone.
Source: Facebook Lite