Something I learn worthful from Challenges.

Question

<a href="tel:1234">Call 24*7</a>
I learned html but never hear about this type.
Playing Challenges is better for increasing our knowledge.

Answer 1

tel: refers to telecom protocall
which wil dial 1234 in this case or on smartphone it will open dialer app

you can also use
mailto:
this protocall is used to send mail
on smartphones it'll open mail related apps

Answer 2

ya i know about mail in starting