The typical authority sites Zillow, Walkscore, and GreatSchools offer some great data and insight for your users. But to use that data, you have to link to the source.
What is the ranking cost – if any? Is it worth it?
According to moz’s onpage seo grading, it is okay to link out. Here is a an excerpt from their on-page grading tool:
I have approximately 50 real estate websites here in the Northeast. Here is what I found:
- My pages with outbound links to zillow (for zillow’s zestimate) were not competive
- My pages with outbound links to Walk Score had no impact
It seems to be a reasonable conclusion, if your outbound links are to a site in which you are competing for page placement then that content maybe considered duplicate and disregarded. With respect to SEO, I see no benefit in outbound links other than the content value for your user.
These are my results, what do you think?