tracking ability definition

i am a little confused as to what the term "tracking ability" means when referring to a cartridge/stylus and how this translates to percieved sound? could anyone explain?

reason i ask is i recently received an response from KAB regarding my question about the difference between the Trackmaster II AE and the ortofon pros40, saying that the Trackmaster II AE has "fuller midrange and best tracking ability" while the Ortofon pros40 has "more transparent treble and punchier tighter bass"

would i be right in assuming that this means the stylus makes good contact with the groove therefore better reading the recorded sound and playing it more accurately, with more detail?