Hindring search engines to interpret a link as a vote for the link target

Steering SE Crawlers · Index · Expand · Web Feed

Previous PageURL Specific Control: the Robots META Tag

Tagging irrelevant page areas: class=robots-nocontentNext Page

Google has introduced the NOFOLLOW value in the <A> tag's REL attribute in January, 2005, as an instrument to prevent comment spam. Yahoo, MSN and guestbook/forum/blog software makers quickly joined the initiative. In the meantime this syntax found its way into Google's guidelines and Google reps encourage webmasters to use it anytime they can't vouch for a link.

If you can't vouch for a link, for example because it's added by a user or scraped from a foreign source, add REL=NOFOLLOW to the link. If you want to make other use of the REL attribute, separate the values by spaces. Example links:

<A HREF='http://foreignDomain.com/anyPage.html' REL='NOFOLLOW'>anchor text</A>
<A HREF='http://foreignDomain.com/anyPage.html' REL='external nofollow'>anchor text</A>

This is not a negative vote for the page you link to. Use REL=NOFOLLOW carefully and don't abuse it. Links marked with REL=NOFOLLOW do not pass PageRankô to the linked page, that means they do not contribute to the link popularity of the target. There are good reasons not to use REL=NOFOLLOW to hoard PageRankô. First, PageRankô hoarding is easy to discover and you will earn a ranking penalty for over-optimizing. Second, other webmasters are smart too and will cancel link trades if you cheat.

Search engine crawlers harvest even unlinked URLs. In rare cases when it's necessary to hide a URL from spiders completely, don't output it server sided. Use java script to write the URL string in the web browser then.

Tagging irrelevant page areas: class=robots-nocontentNext Page

Previous PageURL Specific Control: the Robots META Tag

Steering and Supporting Search Engine Crawling · Index · Part 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · Expand · Web Feed

Author: Sebastian
Last Update: Monday, June 20, 2005   Web Feed

· Home

· Internet

· Steering SE Crawlers

· Googlebot-Spoofer

· Google Sitemaps Info

· Web Links

· Link to us

· Contact

· What's new

· Site map

· Get Help

Most popular:

· Site Feeds

· Database Design Guide

· Google Sitemaps

· smartDataPump

· Spider Support

· How To Link Properly

Free Tools:

· Sitemap Validator

· Simple Sitemaps

· Spider Spoofer

· Ad & Click Tracking

Search Google
Web Site

Add to My Yahoo!
Syndicate our Content via RSS FeedSyndicate our Content via RSS Feed

To eliminate unwanted email from ALL sources use SpamArrest!


neat CMS:
Smart Web Publishing

Text Link Ads

Banners don't work anymore. Buy and sell targeted traffic via text links:
Monetize Your Website
Buy Relevant Traffic

[Editor's notes on
buying and selling links

Digg this · Add to del.icio.us · Add to Furl · We Can Help You!

Home · Categories · Articles & Tutorials · Syndicated News, Blogs & Knowledge Bases · Web Log Archives

Top of page

No Ads

Copyright © 2004, 2005 by Smart IT Consulting · Reprinting except quotes along with a link to this site is prohibited · Contact · Privacy