Google has updated the link schemes document in the Webmaster Guidelines. It has added large-scale guest posting, optimized anchor text in articles or press releases, and advertorials sections under the list of types of links that are against the Google guidelines.
Here are new guideline examples:
- Guest posts or large-scale article marketing with keyword rich anchor text links
- Native ads or advertorials where articles with links passing PageRank are on paid basis
- Articles or press release, which have links with optimized anchor text are being distributed on other sites
Google has removed following guidelines examples:
- Links inserted into articles with a little coherence
- Linking to unrelated sties or spammers to manipulate PageRank
Large-Scale Guest Posts
If you are doing guest blogging on a large scale with the intention to build links but serving bad quality content, Google might take action against guest blog or links being passed in the article.
After penalizing an e-commerce website, Matt Cutts has already told that advertorials with links need to be no-followed.
Press Release with Optimized Anchor Text
Google considers the links with optimized anchor text in press release or articles as unnatural links, violating the guidelines. Therefore, if your article or press release is distributed through an article site or wire, make sure to no-follow the links, if there are in the form of an optimized anchor text.
Here's an example by Google:Google Updates Link Schemes Documents; Warns Against Guest Post, Advertorials, and Optimized Anchor Text!,