Ok here is a really simple answer, but I suggest you search poketracker threads on here for a more detailed explanation.
19/10/2 474 relates to stats that are usually available for tracking databases. the 1st number is the VPIP - which means the % of time you voluntarily put money into a pot (excl the blinds), so the higher the %age the more pots you play.
The second number the the PF - which means the %age of times you raise the pot pre flop.
The 3rd number the AF - which is your total aggression factor.
Last number is the total amount of
hands you have those stats for.
Hope this helps a little.