EDIT – In 2013 – You really should just nofollow your comments if you run a blog. Most blog comments come with this as default now.
“Nofollow” provides a way for webmasters to tell search engines “Don’t follow links on this page” or “Don’t follow this specific link.”
How does Google handle nofollowed links?
Basically Google ignores links with the attribute “nofollow” on them, which allows you to link to a site and not share your websites reputation with it (we are told, by Google). On the whole – this seems to the case.
In general, we don’t follow them. This means that Google does not transfer PageRank or anchor text across these links. Essentially, using
nofollowcauses us to drop the target links from our overall graph of the web. However, the target pages may still appear in our index if other sites link to them without using
nofollow, or if the URLs are submitted to Google in a Sitemap. Also, it’s important to note that other search engines may handle
nofollowin slightly different ways.
What are Google’s policies and some specific examples of nofollow usage?
Google presents us with some cases when to consider using nofollow on OUTBOUND links:
- Untrusted content: If you can’t or don’t want to vouch for the content of pages you link to from your site — for example, untrusted user comments or guestbook entries — you should nofollow those links. This can discourage spammers from targeting your site, and will help keep your site from inadvertently passing PageRank to bad neighborhoods on the web. In particular, comment spammers may decide not to target a specific content management system or blog service if they can see that untrusted links in that service are nofollowed. If you want to recognize and reward trustworthy contributors, you could decide to automatically or manually remove the
nofollowattribute on links posted by members or users who have consistently made high-quality contributions over time.
- Paid links: A site’s ranking in Google search results is partly based on analysis of those sites that link to it. In order to prevent paid links from influencing search results and negatively impacting users, we urge webmasters use
nofollowon such links. Search engine guidelines require machine-readable disclosure of paid links in the same way that consumers online and offline appreciate disclosure of paid relationships (for example, a full-page newspaper ad may be headed by the word “Advertisement”).
Google is serious about this stuff. If you let your website become a free for all links farm – Google will not trust the links from it. You need to decide if you care about such things.
I wouldn’t bother using nofollow on internal links, though.
- The Best WordPress SEO Plugin
- Advice – Nofollow Blog Comments
- What happens with internal, nofollowed self pings?
- Host WordPress blog in a subdomain or directory?
- How To Exclude A Category or Post From RSS Feed in WordPress
- List Recent Posts From Single Category on Posts Within Same Category
- Add Text To Home Page Only on WordPress Blog
- WordPress Contact Form 7 Redirect To Thank You Page
- Speed Up Contact Form 7 Plugin For WordPress
- Dynamic PHP Copyright Notice in WordPress
- How To Import Large WordPress XML File Above Default Limit Size