Blogging is the new "it" thing as far as marketing goes, as it allows a company to post information and topics of their choice, but also allow for a two way discussion between customers ans the company; something previous types of promotional marketing did not allow for.
Credibility cerntres around 3 factors:
- Opportunity -Is the source in a position to know?
- Ability -does the source have the education or experience?
- Dependability -Has the source proven to be reliable and trustworthy?
(source- Webster’s Collegiate Dictionary)
If an author is able to demonstrate these three factors, they can then be deemed credible.