What should the ratio between marketing spend and sales income be? Is a conversion rate of 3% low or high? And how can you know if the users actually love your product?

In the 7th episode of Foundations, Lior Krengel and Eran Zinman talk about a few other metrics, that together with the metrics we discussed in the previous episodes, complete the basic set of tools for every SaaS company: Conversion to payment, Magic number, Rule of 40 & Engagement.