SEO is one of those subjects that is both simple enough to understand, yet incredibly complex when you dig deeper.
CRAWLERS AND INDEXING: At a base level, every search engine, be it Google, Yahoo! or Bing, works in the same way. They first send out ‘crawlers’ that collect all the data from your site. That information is then organised, creating an ‘index’ that is fed through a secret algorithm whenever a query is typed in. This process creates a list of results ordered by relevance, which is displayed on the SERP.
MAKING GOOGLE’S JOB EASIER: SEO enhances the structure and content of your website, which does two things: it makes it easier for the crawlers to collect data from your site, and it makes your site as enticing to the search engine algorithm as possible (while no one knows exactly what the secret algorithm wants, we have a good idea).