Google Authorship is one of the most relatively recent exciting new developments in the world of SEO and digital marketing, and is used for a variety of reasons.
One of the main reasons is that it helps individual authors to establish themselves as authority figures in a certain niche. However, some authors, such as bloggers, might be authors for a number of websites across a variety of niches.
Authors should think carefully about where they link to with their Google Authorship if they’re trying to develop their authority in a particular niche, as appearing as an author across a number of sites can have a detrimental influence on their authority. In addition, Google+ members are less likely to follow a person who is not a specialist, which in turn will lead to lower numbers in search where Google display how many circles an author has been added to, which subsequently will influence the clicks their content gets.
If you have used Google Authorship to link to a collection of websites in the same niche sector, however, you’ll look much more like a specialist and find it much easier to build your authority and standing in your niche. The difference between a sector specialist and a great writer that writes across various subjects is stark, and the reality is that people are unlikely to worry too much about how great your writing is; they simply want to read the most authoritative content.
If you can help it, only use your Google+ profile to link to websites in your specialist niche sector.