Will Google AMP affects the SEO of a website?

One of Google's ranking factor for SEO is the Accelerated Mobile Pages (AMP). This is because AMP pages load faster. But their tweak is that this rating element only adds Mobile SERP values for (search engine result page).

That means, if you have AMP versions of your web pages, relative to desktop SERP, there's a high probability of it being rated higher on Mobile SERP.

Search Engine likes websites that load easily and gives users a seamless user interface since it is quite easy to use by visitors.

AMP has two main SEO advantages.

1. The first SEO advantage is the quick load of the webpages, Google improves SERP fast pages. A ranking factor acknowledged by Google is Fast Loading Pages. Not just some pages that load easily with AMP, any other websites which load faster is a good signal for search engines.
2. The second advantage is that Google gives AMP pages on SERP a "mobile-friendly" label.

Read more on How Google AMP improves the SEO of a website?