Digital marketing utilizes online technologies like computers, phones and digital media to promote products and services. It involves areas like pay per click advertising, search engine optimization, responsive websites, email marketing, display advertising, mobile marketing, social media marketing and analytics. Social media marketing uses social networks to promote websites. Search engine marketing uses paid ads on search engine results pages. Social media optimization generates publicity through social media. Search engine optimization gets traffic from organic search results. Affiliate marketing earns commissions by promoting other companies' products. Common types of digital marketing content include video, audio, images and articles. Popular tools for digital marketing include Hubspot, Ahrefs, Proof, Survey Anyplace and Google Adwords.