I purchased GPS Photo Tracker to try out and I have a question about some of the slang and I was hoping someone could help me out with it.

There is some settings where I can change to track at various intervals. Here are the two 10 second options. It is obvious that the first option saves more data but could someone explain what this all means.

GGA/GSA/RMC/VTG->10 sec
Only RMC->10 sec