Google AdWords v SEO? Why choose both?

Google AdWords v SEO? Why choose both?. :

Search engine optimization and Google AdWords are the two main components of SEM or search engine marketing. If you want to run a successful digital marketing campaign, you need to make the most of both. While they are different from one another, there are many situations when you need to use them both together and separately, based on your marketing goals and your business.

https://www.xourx.com/google-adwords-v-seo-why-choose-both/