What does “dominoes” mean here?

Question

"It's as if once you make a significant error, you cant help but make a zillion others, like dominoes falling over in succession."

This line is from a novel called "Desperate in Dubai".

Answer 1

It stems from the practice of putting dominoe tiles up in rows and letting them fall over in a chain reaction, each tile tipping over one or more other stones when falling.

It also is the root of the expression domino effect for a chain reaction in general.

Answer 2

Dominos falling on top of each other