SEO is the process of optimizing a website to obtain high rankings in search engines. An optimized website will rank for relevant search queries and have a user-friendly interface across devices. Understanding how search engines work and optimizing content for Google is important because Google has the largest market share. Key Google tools for SEO include Adwords for advertising and Google My Business for listing a business locally. Before beginning SEO, businesses should identify objectives, understand customers, and check industry trends.