please help me write a short speech about The usefulness of The internet and its hidden dangers

internet is an informatic thing where you can surf on, it's a very good thing who serves everytime : when you want know the weather he does and you missed the weather ; when you want know an information about an address ; when you want translate something.
In other words : internet is very useful however it can be dangerous when you give some informations about your life, about you; some people can use them for bad things.
Concequently internet is a good thing but it can be dangerous when
you do not pay attention.