This document provides an overview of digital marketing strategies including search engine optimization (SEO), search engine marketing (SEM), social media optimization (SMO), social media marketing (SMM), pay-per-click (PPC) advertising, backlinks, domain authority, page authority, dofollow and nofollow links, spam scores, classified submissions, social bookmarking, image optimization and submission, blog submission, affiliate marketing, and PPT submission. The document defines each strategy and provides brief descriptions of how organizations can use them to grow their online presence, connect with customers, and drive traffic to their websites.