What exactly is Boost?

I'm a relatively new player. I received a message in my Clash of Clans inbox that said this:

Boost anything for only one gem! Event lasts until January 7th.

What is Boost? I cannot find a Boost option on any of my structures.

2 Answers

Boosting is when you spend gems on any structure that creates something(spell factory, gold mine, elixor collector, dark elixor drill, dark barracks, and [normal] barracks) to either reduce time building or double resources made.

For example: if you click on any gold drill in your base, you will have the option to boost for 1 day, which doubles production, for 1 gem. Normal cost of boost for gold mines is 11gems.

The "boost" in Clash of Clans means that, for example, boosting a gold mine would make the mine produce gold faster. The "boost" is the green light circling resource collectors that you might see when you visit other players. Basically, it just boosts your resource collectors. Hope I could help! :)