Simplify the following text for a Grade 6 native English-speaking person.
Original: The tags usually come in pairs : an opening tag to tell the browser when to start doing something , and an ending tag to tell the browser when to stop doing something . There are many different kinds of tags , and each one has a different purpose .
Simplified: The first tag in a pair is the start tag , the second tag is the end tag ( they are also called opening tags and closing tags ) .