It's such a waste of time

Question 1

It’s such a waste of time

Answer 1

You’re talking to a friend about Facebook. You are trying not to use it. This is how you explain why.
It’s such a waste of time.
(something) is a waste of time
When something is “a waste of time”, it means that you spend a lot of time doing it, but don’t get any benefits from it in the end. This is a common phrase people use when they’re talking about:

things that they have to do but don’t want to do (like waiting in a line)
things that they want to do but don’t think are useful (like playing video games or using some websites)
(something) is such a (something)
The word “such” is similar to “so” except it’s used with nouns instead of adjectives:

He’s so handsome.

He’s such a good-looking man.

I used to be so lazy.

I used to be such a procrastinator!
when you want to use “waste time” as a verb, you say “waste (one’s) time (doing something)”. For example:

Don’t waste your time trying to fix that thing. Just get rid of it and get a new one.
“Collecting information” sounds like something you’re doing for a research paper at school. “Looking things up” is a better choice to describe finding things for your personal life.

You would “get” information “from” the Internet:

I got a lot of good information from the Internet.
But you would “find” information “on” the Internet:

I found a lot of good information on the Internet.
“On the Internet” is also more useful with a wider variety of verbs: “read (something) on the Internet”, “chat with people on the Internet”, etc.