No, SEO is one of the techniques in Digital Marketing. There are 7 other modules apart from SEO. SEO is the process of improving website ranking. SEM focuses on creating Ads on the search networks. SMO is done to promote the brand and engage customers using trendy social media as a platform. E-mail Marketing is used to send bulk e-mails or newsletters to prospects or customers for promotion or announcing offers. ORM is the tool to protect your online presence and GA is the heart of Digital Marketing.