I'm confused how we are going from 400 clicks per day last October in the GSC graph (which is 12,000 hits per month) to 60,000+ visitors per month from SEO, esp

I'm confused how we are going from 400 clicks per day last October in the GSC graph (which is 12,000 hits per month) to 60,000+ visitors per month from SEO, especially given how little growth there is in that full year of data, and how highly the site already ranks. That would be an unbelievable SEO growth story, and based on the rest of the article that would be most of the value of this project.