Digital marketing uses various electronic technologies to promote brands and products online. This document discusses key digital marketing tactics for e-commerce including search engine optimization (SEO), search engine marketing (SEM), email marketing, social media marketing, and digital display advertising. SEO involves optimizing websites to rank higher in organic search results while SEM includes both unpaid SEO efforts as well as paid search advertising. Email, social media, and display ads are also important for connecting with customers and driving online sales.