the second number is the amount of seconds that get added to your clock at the end of each move
time nomenclature

the second number is the amount of seconds that get added to your clock at the end of each move

Time Controls - Everything You Wanted To Know...
https://www.chess.com/blog/RussBell/time-controls-everything-you-wanted-to-know
I'm new to playing on chess.com and don't understand some of the time options available to choose. Like, 1/1, 2/1, 5/5, 3/2, 45/45, etc. I haven't been able to find anything on this website or elsewhere that describes what these mean. I tried playing a 45/45 game today and the game clock made no sense to me. Help this noob out!