Hey Joanne,
In its simplest term a blog is just a place where people or businesses create a web page that they frequently and easily update - it is a place for people to read news articles and other information with the ability to post comments and opinions as well.
A-M B-Well does host its own blog at
http://fishoilblog.ca/ - it has tonnes of information that you can review and ask questions about and is easy to use.
Please let us know if you have any questions

Thanks again,
Nico