Imagine you have a toy car that you can control with a remote. You press different buttons on the remote to make the car move in different directions, like forwards, backwards and left or right.
Test automation is like having a special remote control that helps you test computer programs or apps. Just like how you can control the toy car with the remote, the test automation tool can control the computer program or app and make it do different things, like clicking on buttons or filling out forms.
Why is this helpful? Well, imagine if a company creates a new app that they want people to use. But before they release it to everyone, they want to make sure it works properly and doesn't have any bugs or errors. Testing this manually, by having a person sit down and try every possible action in the app, would take a really long time and might not catch every problem.
But with test automation, they can create a set of automated tests that run automatically and test the app in a much quicker and more thorough way. This means the company can be more confident that their app works well and is ready for people to use.
So, test automation is like having a special remote control to help test computer programs or apps, and it helps companies make sure their products work properly before they release them to the world.