Using Noindex, Nofollow HTML Metatags: How to Tell Google Not to Index a Page in Search
Hubspot
JULY 19, 2016
What's worse, you may even find that some of your highest ranking pages for some of your long-tail keywords might be your thank-you pages -- which means you could be inviting hundreds of potential leads to bypass your lead-capture forms. That's a pretty compelling reason why you'd want to remove some of your web pages from SERPs.
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