noindex?

Any special thoughts on why not let search engines index the site? Or just a simple misstake?

This depends on the purpose of the website administrator. As I personally, when the new website builds I usually leave the noindex attribute to complete the website content.

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Any special thoughts on why not let search engines index the site? Or just a simple misstake?

Add noindex meta in your Html

Code:

<meta name="robots" content="noindex">

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I will take some time for a search engine to index a certain website.

You may even set the password to lock particular websites.

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Yeah if you are talking about not indexing whole site you are curently building, you should use noindex in meta robots or even blocking all webside in robots.txt There is no other need for that. If you don't want to index specific web pages, that's a whole different story..

Maybe if we tell people the brain is an app, they'll start using it