Sean Ellis, the OG who coined the term 'growth hacking' explains the key determinants to growth for both SaaS and traditional businesses. In under one hour, you'll find out the macro version of why this approach to growing any business is so effective. I really don't need to write any more here. If you are a founder, a business owner, a growth professional, product manager or marketer and you're interested in the non-BS side of the growth discipline - you need to press play. 
Over and out.