How Search Indexer Works

Here are mentions of how the search indexer works.

• Crawling: It is process in which search engine send a group of bots commonly known as crawlers or spiders in order to find newly updated content. The indexer initiate a crawler to explore and retrieve data from multiple sources like website, database etc. The indexer collects and store the content for analysis while crawling.
• Text Extraction: Indexer fetches the textual information from the content after collecting that was collected during Crawling. In this stage, Content may need to stripped out any HTML or formatting tag, converting document into plain text and identifying their language.
• Tokenization: In this stage the extracted text is the tokenized , which means that it is broken down into individual words or concepts. This method divides the text into smaller parts for analysis.
• Text Analysis: To enhance search accuracy, the indexer conducts text analysis activities such as stemming (reducing words to their root form), stop-word removal (filtering out common terms such as “the,” “and,” and “in”), and other natural language processing techniques.
• Index Creation: The indexed data is then stored into a data structure from where the data can accessed in an efficient way. This data structure is commonly referred as a ”index”. It keeps track of which terms appear in which documents and where they appear in those texts.
• Ranking and Scoring: It may calculate relevance scores for each document based on search terms and other variables. This evaluating helps in the ranking of search results, ensuring that the most relevant documents appear at the top.
• Query Processing: The indexer quickly searches the index after receiving a search query from a user and returns a list of relevant files. The user normally sees these outcomes in ranked order.
• Updating: The index must be updated on a regular basis by the indexers. To reflect updates or additions, this requires regularly re-crawling and re-indexing the content.

Search Indexer is a very important component for fetching relevant information as it collect, organize, and store the information from the web, this helps search engine deliver the relevant search result of the user’s query.