Part of the technology behind search engines and search engine optimization consists of the processes of crawling and indexing. But what is crawling and indexing? These are processes that search engines like Google use to discover and organize web pages. They are important to understand for anyone who wants to master SEO, and often when you need to solve an SEO problem too. It’s essential to ensure your site is being crawled and indexed if you want its pages to be discoverable through search engines.