WHAT DOES LTE REALLY MEAN?

[T-ball]

I KNOW IT MEAN LONG TERM EVOLUTION BUT THAT JUST A DEFINITION TO BEGIN WITH MY REASON FOR ASKING THAT IS THAT I WAS WATCHING A PORN VIDEO AND IT SAY LTE AT THE TOP AND WHEN I WAS DONE WATCHING THE VIDEO IT SAY 4G AND I HAVE HOME WI-FI BUT IT TOOK TO LONG TO LOAD SO IT TOOK OFF THE HOME WI-FI TO SEE IF IT WILL LOAD FASTER AND IT DID SO WHAT THE REAL DIFFERENCE BETWEEN 3G 4G LTE I MEAN WHAT MAKE IT FASTER OR HOW DOES IT GO FASTER FOR MY PHONE EXPERIENCE I NEVER SEEN LTE I HEARD OF IT BUT WHEN IT POP THAT WAS THE FIRST TIME SAW IT LOAD ON MY PHONE WHY DID IT POP OFF FOR THE VIDEO ONLY BECAUSE LIKE I SAID ONCE I WAS DONE WATCHING THE VIDEO GO BACK TO 4G IMMEDIATELY SO WHY DID IT POP OF FOR THE VIDEO ONLY AND WILL I BE CHARGER FOR THE LTE SERVICE