Syntax highlighting is like coloring inside the lines of a picture. When we write computer code, there are different parts like words, numbers, and symbols that all have different meanings. Syntax highlighting helps us see those different parts by coloring them different colors.
For example, if we have a line that says:
print("Hello World!")
The word "print" might be colored blue to let us know it's a special word that tells the computer to show the message "Hello World!" on the screen. And the message itself might be colored green to show that it's just regular text.
Syntax highlighting helps us read and understand code more easily by making all the different parts more visible and easy to tell apart.