Each one has different objectives, for example, if you want sales and visits on your website, AdWords is the best option for Business Strategy.
But if your goal is to build long-term brand visibility and trust, the SEO option is a better bet. The SEO process takes longer than AdWords to get results on the first page, in the long run, it can be cheaper because you don’t have to pay recurring advertising costs.
Google Adwords is an advertising platform owned by Google. So advertisers use this platform to publish their ads on Google search results pages, on Google Marketing Channels (YouTube, Gmail, etc.) and thousands of other AdWords websites as publishers.
While AdWords is a pay-per-click advertising network in which an advertiser pays Google every time someone clicks on the ad being displayed. Your ad can be in text, picture, video, and mobile formats. The ad is typically in the form of a title line and a two-line description of your service or product.
Search engine optimization or SEO has to do with getting better rankings on Google, Yahoo, Bing and other search results pages from major search engines. To accomplish this, you need to make sure your website is search engine friendly. SEO is a process for correcting your existing website or web page.
Difference between SEO and AdWords
Adwords traffic is paid for while SEO traffic is free.
Adwords ads appear at the top and bottom of Google search results and you can get one of those ad positions under certain conditions, but with SEO you have to work much harder to get one of the top positions in organic search results.
Adwords results are faster than SEO, as you can build advertising campaigns almost immediately and start getting target traffic, while with SEO you need much more time to get good rankings and traffic (especially for new websites).
For Adwords, specific words are used for Digital Advertising while for the SEO result you only need a few keywords.