This is a must watch video and read the study.
In short it shows/proves links and high quality links are one of two factors that drive your google Seoul. The other is quality content.
Nb as I’ve said for years it’s always content , content and content. Text content, image content and video content. Delivered at the right time, I.e don’t talk about valentines at Christmas. Properly indexed. Yes that dies mean adding title, description, meta tags, alt tags and transcriptions and now structured data to your content.
See their video here they link to the study if you want the full mind bending stuff.