SEO should be a core tactic in any marketing strategy. While it might seem difficult to understand at first, as long as you find the right course, book or audiobook, and devote your time to learning, you'll be in good shape. Considering that there are over 200+ ranking factors in Google's current algorithms, learning, digesting and successfully implementing good SEO tactics is essential to the success of your website or blog.
I’ve seen so many cases of webmasters nofollowing legitimate external links it is not funny. Any external link on their site is nofollowed, even when quoting text on the other site. IMO, the original purpose of nofollow has long been defeated in specific industries. As more webmasters continue doing everything they can to preserve their pagerank, the effectiveness of nofollow will continue to erode.
While ordinary users were not that interested in pages' scores, SEOs of a different caliber felt that this was a great opportunity to make a difference for their customers. This obsession of SEOs with PageRank made everyone feel that this ranking signal is more or less the only important one. In spite of the fact that pages with a lower PR score can beat those with a higher score! What did we receive then, as a result?

Page Rank