DAU/MAU is a popular metric for user engagement – it’s the ratio of your daily active users over your monthly active users.

They call it L30 at FB and is a recent tool we discovered from Mr. Andrew Chen's Blog.

This about businesses and their dependance of paid marketing channels.

The hidden reason why A/B tests aren’t as effective as they look.

Many of the Social Apps are very different from each other, showing that success can come from many variations.

Startups build a great brand by being successful, finding product market fit and scaling traction, etc. But it’s not a real lever.