ELI5: Explain Like I'm 5

Cabtaxi number

You know how sometimes when you need to go somewhere far away or don't want to walk, you might take a ride in a big car called a taxi or a cab? Well, every taxi or cab has its own number which helps people find it or call it to come pick them up.

Think of when you play hide-and-seek with your friends, you might say "I'm hiding behind the big tree with lots of branches." That's kind of like how taxis have their numbers, so people can say "I need a taxi with the number 1234" and then the company that owns that taxi can send it to them.

It's important to know the number of a taxi you're riding in or calling because you want to make sure you get the right one and not accidentally get into someone else's taxi. Plus, if something goes wrong, like you leave something in the car or need to complain about the driver, you can give the taxi number to the company and they'll know exactly which taxi and driver you're talking about.
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