What about SEO guide ? is there any ?
I would say there is many basic but general information because each site it different and have a bit different purpose. it is hard to write a accurate and working SEO guide for each and every website.
Basic knowledge is well explained by moz :
It`s important to understand how people use search engines, around 80% of searches are searches connected to finding information. You should use it.
Cool SEO tip is to go from very wide funnel to the product purchase with.
For example do You sell shorts ?
Write and content like ( top trendy shorts 2016 ) for peole to get to know with the product. Then write some shorts brand comparison, reviews from there try to direct user to show him product offer.