Are blog links downgraded by search engines like guest book links?
Because there are many types of blog links, there is often confusion about their treatment by the various search engines, most notably by Google. The links from the blogroll and from within the posts are treated like any other inbound, outbound, and internal website links. They are awarded Google PageRank transfer and link popularity value in accordance with the search engine algorithm. The links that are being downgraded are links sent out from blog comments as a result of spamming activity by other webmasters. Normal blog links are not affected.