Digital marketing, also called online marketing, uses the internet to promote brands and connect with potential customers. It includes tactics like search engine optimization (SEO), pay-per-click (PPC) advertising, social media marketing, content marketing, email marketing, mobile marketing, marketing analytics, and affiliate marketing. SEO optimizes websites to make their pages more easily findable and relevant to user search queries, while social media marketing uses social media platforms as marketing tools. PPC involves advertisers paying each time one of their ads is clicked, so payment is only incurred from ads that are actually engaged with.