What is meant by a delay?

My apologies for asking a question that probably everyone knows about except me, but I played in my first tournament in close to 20 years recently, and the time was 90 minutes with a 5 second delay. I'm not sure what the 5 second delay thing is? Any advice would be helpful

After your opponent moves and presses the clock there is a 5 second delay before your time starts counting down.

This is different from increment in that instead of adding 5 seconds, the timer is just delayed from counting down. Both delay and increment allow a player to avoid losing on time by moving quickly, but with delay it's not possible to accumulate any extra time on your clock.

5 second delay means that when its your move, the clock will tick down to 5 seconds and once those 5 seconds are over your real time starts moving, here is what i mean:

here what happens is vishy only has 1 second but until the 2 sec delay ends that 1 second wont ever start moving, so as long as he moves quickly as shown in the video it wont start

thanks. Its been so long since I played in an actual tournament I forgot what some of these things meant. I appreciate the help.

There are plenty of beginners and people returning to chess after a long time off, no shame in asking basic questions

yeah what llama said, its no problem glad to help