Mail is a PHP topic. In plain words you use it for a short Mail example in a college portal page. Don’t start with a slogan — start with that picture.
Smallest example: the smallest Mail example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Mail.
From the example next to this theory — Mail: scores array, print avg, then high marks.
Trap — only saying “Mail” with no example. Fix that before you talk about advanced PHP.
Viva — what is Mail? Then show the smallest Mail example you can type. Then name the trap.
What is Mail? Show this: the smallest Mail example you can type. Trap: only saying “Mail” with no example.