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Both are supported by all crawlers which respect webmasters wishes. Not all do, but against them neither technique is sufficient. You can use robots.txt rules for genera ... See More
On the most basic level, neither the meta robots tag or the Robots.txt has authority over the other – but rather the “noindex” request has authority over the “index” requ ... See More
Meta Robots tag is much better as it helps in forcing the search engine crawlers not to index and display the hidden pages in your server.
Meta tags are used to provide information about the html document . for eg . for search engine you can provide some keywords in meta tag. Or it can be used to put th ... See More
Metadata is data (information) about data. The tag provides metadata about the HTML document. Metadata will not be displayed on the page, but will be machine parsable. M ... See More
Personally I think the meta tag is even more useful than the robots.txt file. The robots.txt file is intended to PREVENT bots from spidering files in the first place. ... See More
There is no real "MAJOR" difference between the files. They both do the same work however the META tag is not as reliable as the .txt This is because I think (c ... See More