Below is a reference list for various articles we have written and highly recommend for everyone who wishes to get an in-depth understanding of SEO domains.
A very elaborated article written in 2013 (but still highly relevant for the most part), explaining the basics and the essence of evaluating domains and backlinks for SEO. It also discusses some of the techniques we use ourselves when analyzing our domains.
A brief article explaining why searching for good expired domains is a waste of time, and even dangerous.
A brief article exploring three myths about SEO domains.
A very elaborated article about the SEO metrics and signals industry.