A search engine is a web-based software system that is developed to search and locate relevant information on the World Wide Web. Search engines generally answer the queries entered by the users and give them a list of search results.
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In simple words, SEO or Search Engine Optimization denotes any activity performed for the improvement of Search Engine rankings of websites, products, services or other content. It shows unpaid results which are also referred to as “free”, “organic”, “natural” or “earned” results.
The importance of SEO starts with the desire of the companies to gain more traffic for their websites. The ranking over search engines matter because users pay more heed to the first 5 searches on Google. Moreover, users tend to trust Google’s refined search results because they consider these searches to be more authentic and specific.
The names of some search engines are- Google, Bing, Yahoo!, Baidu, DuckDuckGo and Yandex.
The founders of Google are Larry Page and Sergey Brin.
Google was founded on 4th September, 1998.
Crawling or web crawling refers to an automated process through which search engines filtrate web pages for proper indexing.
Web crawlers go through web pages, look for relevant keywords, hyperlinks and content, and bring information back to the web servers for indexing.
As crawlers like Google Bots also go through other linked pages on websites, companies build sitemaps for better accessibility and navigation.
Indexing starts when the crawling process gets over during a search. Google uses crawling to collect pages relevant to the search queries, and creates index that includes specific words, or search terms and their locations.
Search engines answer queries of the users by looking up to the index and showing the most appropriate pages.
Search Engine Result Page or SERP refers to the page that is displayed when a specific search query is entered over the search engine. Apart from showing a list of results, SERP might also include advertisements.
Organic result in SEO denotes to the listing of the web pages that are most relevant to the search query entered by the user. It is also referred to as “free” or “natural” result. Getting a higher ranking in the organic result over the search engines is the very purpose of SEO.
Paid results in SEO mean the exact opposite of organic results. It generally denotes to advertisements that are displayed above the organic results.
Several website owners make payments to Google to display their websites for certain search terms or keywords. Paid results show up when some user enters a search query with those keywords.