Learn English – meant by the phrase “Charlie Brown management”

It would be acceptable any place that idioms are usually acceptable, which is to say it is slightly informal but not very informal. It would be ok in magazine writing -- think Slate or Rolling Stone -- but not in academic writing, hard news (i.e., newspaper articles reporting news), and the like.

It means if you have an edge over someone, think of yourself as a little sharper because you have the advantage.

(TFD) - 3. A margin of superiority; an advantage: a slight edge over the opposition.

There's a little bit of an edge to work in a company where you make games asserts that such a company will give you the competitive edge over others.

• Similarly, if your company is on the cutting edge of gaming technology, it is the industry leader.