Thank you all who posted helping me out, also rsbob sent me a private message with all of these terms:

FTP - Functional Threshold Power and is effectively a measure of the power you can hold for an hour, measured in watts
TSS. - Training Stress Score (TSS) is a composite number that takes into account the duration and intensity of a workout to arrive at a single estimate of the overall training load and physiological stress created by that training session
VOM - V O2 Max
And a few other specific to training
KOM. - King of the Mountain (Stava app)
PR - Personal Record (Strava app)