NewSQL is like a new and improved way of storing and retrieving information from a bunch of computers at the same time. Imagine you and your friends are trying to build a really big tower out of a bunch of different blocks. It's hard for just one person to make the whole tower by themselves, so you all have to work together. That's what NewSQL is like - it's a way for a bunch of computers to work together to store and retrieve a lot of information really fast.
It's called "NewSQL" because it's a newer version of something called "SQL" (pronounced "sequel"), which stands for Structured Query Language. SQL is a language used to talk to databases, which are like big electronic filing cabinets. You can put a lot of different kinds of information in a database, like peoples' names and addresses, how much money they owe you, or what kind of movies they like. You can use SQL to ask the database "questions" and get back answers, like "Who owes me the most money?" or "What are the five most popular movies this week?"
NewSQL works sort of like SQL, but it's designed to work with a lot more information, a lot faster. It uses something called "parallel processing" - sort of like how all your friends are working together to build a big tower. That way, NewSQL can handle lots of different questions and searches all at once, and give you answers much faster than SQL could.
So, imagine you're running a big company with a lot of employees, and you need to keep track of their work schedules, what they're working on, and how much money they're making. You could use a database to keep all that information organized and easy to find. But if you had to manually go through every employee's file every time you had a question, it would take forever. That's where NewSQL comes in - it lets your computer system handle all that data much faster, so you can get the answers you need quickly and easily.