What is the index file ? What if i deleted this from domain?

Answer 1

it is main file. Usually when you access donain like "www.domain.com" through browser "index.html" is first default file displayed by server. But it can be diffrent depending on server domain settings.

Answer 2

it is main file. Usually when you access donain like "www.domain.com" through browser "index.html" is first default file displayed by server. But it can be diffrent depending on server domain settings.