When you are as huge as Pinterest, you are happy when your next A/B test shows a 0.1% improvement.
Imagine how happy their growth team was when they saw a 50% increase in conversions.

Hmmm? 🙂

So here’s how they managed to do that:

1. They stopped the user from scrolling after a while (the default action of a Pinterest grid is people scrolling).

2. Instead, they pulled up a little banner that said, ‘Sign up to see more of this content.’

This experiment alone improved their conversion rate 50%.

Crazy!
There’s more…

3. Another experiment helped them figure out how to activate those new users:

3.1. First they created an email flow to help understand how the service worked.
Result: more people unsubscribed than installed their app. Fail.

3.2. Then they started to send emails with relevant content – matching why people joined Pinterest in the first place.
This experiment worked much better and increased activation. Success.

Source: www.reforge.com/blog/casey-winters-pinterest-retention-seo