A citation is a reference to your business on the internet. A local citation can be complete or a partial references to your name, address, phone number, and website (NAP+W) online. The most common type of (structured) citation is a business directory listing.
A reference to your business name, address, phone number, and link in a business directory listing websites such as yelp.ca, yellowpages.ca, and profile.ca. These citations are considered structured because collected business information is standardized and requires NAP+W information.
A reference to your business that is outside of the traditional directory listing (structured citations) found on blogs, event listing websites, job websites, newspaper websites, knowledge base websites, government websites, etc.