People think companies use grammar well, but they questioned the grammar in Apple's "Think Different" commercials in the 1990s. A study shows that big companies make grammar mistakes. The website Grammarly.com looked at the writing of six companies in posts made on a social networking site. They all made mistakes. It said the companies who made fewer mistakes made more money. It looked at the spelling, grammar and punctuation mistakes.

Grammarly compared the mistakes made by six companies. Coke made fewer writing mistakes than Pepsi, and has a bigger share of the cola market. Google made fewer mistakes than Facebook, and makes more money. Finally, GM made more mistakes than Ford. Good grammar probably won't make you buy a Coke. However, Grammarly said good writing shows professionalism, and customers like to buy things from a company they trust.