The key differences between a blog(Web Logs) and a web site is that a blog’s main function is being a web log or online diary. As the term "online diary" suggests, this is where a blogger can generate a lot of interesting personal comment and intimate details and information about a particular niche subject or topic that they have chosen to cover.
Blogs are quick and easy to set up. Blogs are a less expensive way of advertising your business to the online community. A web site on the other hand is the official address and location of a web-based business. Just the place you would expect to find ecommerce tools and landing pages where customers can make a purchase online. Blogs and websites can work hand in hand with one another.