Okay, so when you go to the beach, there are some things you need to know to keep you safe and happy. One of those things is a beach advisory.
A beach advisory is when the people who take care of the beach, like lifeguards or park rangers, tell you that there might be something that could make you sick or hurt you.
For example, sometimes there are dangerous things in the water, like jellyfish or sharks. Or sometimes there might be pollution in the water that can make you sick if you swallow it.
When there is a beach advisory, the people who take care of the beach will put up signs to let you know. These signs might say things like "No swimming" or "Strong currents."
It's important to pay attention to these signs and listen to the people who work at the beach. They want you to have a good time, but they also want to keep you safe. So if there is a beach advisory, it's best to follow their instructions and stay out of the water until they say it's okay again.