What of SEO in 2019?
There is a video made by Yoast, a well known and respected SEO company in Holland.
This is a brief synopsis of the details in the video.
Mobile friendly is the number one requirement with Google now. So your site needs to work and look good on mobile phones.
Have a fast, easily usable, technically flawless website with high quality content that helps visitors.
This website needs to be supported by a brand that offers high quality services and products.