It is very rare for a site to be dropped from the index of the Search Engines completely unless and until it has been penalised or banned. However, temporary variations in the number of indexed pages are common.
So it is very important to notify the Search Engines about a new website by Search Engine submission. Submitting your websites into Search Engines help them to get indexed by the Search Engines. However it is not necessary to submit a site into Search Engines because they tend to find a new site through natural links etc. but it is always a good practice to submit a website which catalyses the process.
Index inclusion is the first step towards practical SEO. It means ensuring that maximum pages from your website are included within the main index database of search engines.
It is very rare for a site to be dropped from the index of the Search Engines completely unless and until it has been penalised or banned. However, temporary variations in the number of indexed pages are common.
So it is very important to notify the Search Engines about a new website by Search Engine submission. Submitting your websites into Search Engines help them to get indexed by the Search Engines. However it is not necessary to submit a site into Search Engines because they tend to find a new site through natural links etc. but it is always a good practice to submit a website which catalyses the process.
What is Index Coverage?
Index coverage refers to the proportion of the pages of your site which are included in the index of Search Engines.
Google Sitemaps are very helpful tools for increasing index coverage and notify Google of the changes occurring on the site. Sitemaps do not guarantee to improve the rankings of your site for existing pages, but it can enable more pages to be included in the indexed database of the Search Engines which in turn increases the visitors. It can also determine the frequency of the visit of Googlebot.
Excluding Pages from the Site Index:
At certain occasions, you may not want the Search Engines to follow links and index certain pages of your website. In this case you may instruct the Search Engine Bots not to follow and index those pages by adding following code on robots.txt file:
User-Agent: * Disallow:/demo/
The above code will disallow all the robots from crawling the entire demo folder. Simply adding a / will disallow the robots from crawling of your whole website.
You can also restrict the robots from indexing a particular page by adding noindex, nofollow attributes.
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