Okay kiddo, a spray bottle is a container that can hold liquids like water or cleaning solutions, and it has a special mechanism called a sprayer that helps you spray the liquid out.
The sprayer works kind of like a water gun - when you squeeze the trigger, water comes out in a fine mist or spray. This is really helpful for lots of things, like watering plants, cleaning surfaces, or even just misting your face on a hot day.
Some spray bottles have adjustable nozzles so you can make the stream thicker or thinner, and others have special features like continuous spray or mist settings. But no matter what kind of spray bottle you have, it's important to always use it safely - never spray it in someone's face, and be sure to read the instructions on how to use it properly.