What is the function of SEO?

Functions of Search Engine Optimization – SEO
Crawling and Indexing
Even as we are discussing the Google Search Engine, Google is crawling the web using web crawlers to organize the information available on webpages and other publicly available content on the Search index. Before you even type in a search, Google web crawlers crawl across billions of webpages organizing the information in the Search index. The crawling process begins with a list of web addresses from past crawls and sitemaps provided by website owners.

As Google crawlers visit these websites, they use links on those sites to discover other pages. Google offers webmaster tools to give site owners granular choices about how Google crawls their site. The information available on publicly available webpages is discovered by software known as web crawlers much in the similar fashion as you browse through the content on the web. They go from link to link and bring data about those webpages back to Google’s servers. When a crawler finds a webpage, the Google systems render the page much as a browser does. They note the key signals from keywords to page freshness and keep a track of them into the Search index.

Search Algorithm
Google ranking systems sort through hundreds of thousands of webpages to give you useful and relevant results in the fraction of seconds. These ranking systems are nothing but a series of algorithms made up to analyze what you are looking for and what results to show you. Here are some of the ways Google uses Search algorithms to return useful information from the web: Analyzing the words of a query to understand it is crucial to return pages with relevant information. Google has built language models to try to understand what string of words should be looked up in the index.

Useful Responses
Google has made a lot of progress in delivering you the most relevant answers, faster and in formats that are most helpful to the type of information you are seeking. Thousands of engineers and scientists are hard at work refining the algorithms and building useful new ways to search.