Which pages on your site should be "no follow"?
 

In SEO Yoast plugin you can set any of your pages to "no follow". I'm assuming that means that the search engines won't index that page? Is that correct?

So does that mean I should set my thank you page, download page, and landing page to "no follow"?

No follow links instruct the search engine to No crawl and index the web page to be displayed in search and result page.
The web pages that are to be included in No follow are the pages which you do not want to display in search engine result page and that pages are such as Payment gateway pages,admin pages etc.

No follow links instruct the search engine to No crawl and index the web page to be displayed in search and result page.
The web pages that are to be included in No follow are the pages which you do not want to display in search engine result page and that pages are such as Payment gateway pages,admin pages etc.