Understanding the seo is a tricky stuff. To understand it better, you need to read about crawling and indexing both.
Crawling:
When Google visits your website for tracking purposes. This process is done by Google’s Spider crawler.
Indexing:
After crawling has been done, the results get put onto Google’s index (i.e. web search).
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Indexing is the process of adding webpages into Google search. Depending upon which meta tag you used (index or NO-index), Google will crawl and index your pages. A no-index tag means that that page will not be added into the web search's index.
In general, indexing refers to the organization of data according to a specific schema or plan. In IT, the term has various similar uses including, among other things, making information more presentable and accessible.
Indexing alludes to the association of information as per a particular outline or plan. In IT, the term has different comparable uses including, in addition to other things, making data more adequate and available.
In layman's terms, indexing is the process of adding webpages into Google search. Depending upon which meta tag you used (index or NO-index), Google will crawl and index your pages. A no-index tag means that that page will not be added into the web search's index.
Ordering alludes to the association of information as indicated by a particular outline or plan. In IT, the term has different comparable uses including, in addition to other things, making data more respectable and open.
Indexing alludes to the association of information as per a particular outline or plan. In IT, the term has different comparable uses including, in addition to other things, making data more adequate and available.
In SEO, Indexing is important because it refers to the submission of your website/links to search engine to get them indexed and also to make them visible on search engine.