How long does it take to see the results from SEO?

Weeks, months, and occasionally years. It depends on the industry in which your website operates, the resources you devote to SEO, and the quality of the backlinks you are creating.

While a new website could have to wait months for results, a large, reliable website might see them in a couple of weeks. There is no such thing as “done” SEO; it is a continuous process.