What is the difference between a text and a frame back link?

Selected answers from the Dumb SEO Questions Facebook & G+ community.

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  Tony McCreath: Not sure what a frame back link is. Where do you get told this?
  
  Whenever I hear the word frame I get concerned. They can often be a negative for seo and usability.
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  Steven Ciccantelli: +Tony McCreath from a free back link checker so many text links and 1 frame let me see if I can find more info.Of course I was hoping this would be a good thing.
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  Steven Ciccantelli: +Tony McCreath from Ahrefs I think but I have used up my freebies so I will have to try later thank you for the fast reply.When I know more I will post.
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  Tony McCreath: I'm guessing it reports that a link was found within a frame.
  
  This really depends on what the link is. It could be some social button or feature that was embedded in a page or a poorly constructed page that uses frames for layouts.
  
  Probably nothing you can do about it, so nothing to worry about.
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  Steven Ciccantelli: +Tony McCreath OK thanks it only shows 1 and I do have some social media buttons on my page.When I can I guess I could ask webmaster to put no follow if it is hurting site.Or maybe I just misread result.
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  Matt Hintze: It's an Iframe link; you can usually see them on prweb's press releases, like this one for Harry Potter (bottom): ;http://www.prweb.com/releases/costume-store/costume-rental/prweb10981202.htm, or this crappy one I made: buyhomepagebacklinks.com  ;I'm not sure it has much value except for diversity.
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  Steven Ciccantelli: +Matt Hintze awesome I did do a PR web release do just leave it alone then? While on subject is an image link a good way to go if I can find any? Again thank you SEO is rather capricious I think I understand and do the right thing....then it seems to change.
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  Matt Hintze: Yeah, iframes are totally fine--the usual youtube embedding.  ;It's theory, but I wouldn't do too many image links, because of their connection to advertorials.  ;But, it's not a bad idea to have some and use the alt tag.  ;I typically do rel=nofollow with them to keep it safe.
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  W.E. Jonk: From the expert panel in this weeks SEO Questions hangout on air on 01:44:24 into the YouTube video: https://dumbseoquestions.com/q/what_is_the_difference_between_a_text_and_a_frame_back_link