Swap meet question

[HEChicken]

On my local CL, I've started seeing ads about various swap meet times and locations and realized - I have NO idea what a swap meet even is! Before I drive across county lines to find out, I thought I'd see if anyone here can clue me in?

 

[chickencoop31320]

kinda like a flea market or a big yard sale-ish type thing.
fun things to do while you're there too.

 

[HEChicken]

Thanks! Sounds like my cup of tea....