A blog (short for web-log) is a website in the form of a journal, with dated entries regularly posted with thoughts of any kind... In French, the equivalent term invented for the occasion is "joueb" for "journal-web"!
Linking to other blogs is how people make money.. Archive posts is helpful RSS feed: Real Simple Syndication
WIKI collaborative space of a group of people are editing
Can do that with Blog but usually one voice versus many
Willie Crawford was an Air Force officer flying C130 cargo planes. Knowing how to do that was pretty valuable, but Willie wanted to do something else. He didn't know much else but one thing he did know was how to cook chitterlings.
He set up Chitterlings.com, started producing a newsletter and then a recipe book that is still doing six figures.
affiliate programs (e.g., Commission Junction, Linkshare) -- if I recommend a sweater at Saks (for example) and people click on the specific link I give them, any purchases made at Saks during that visit (directly from my link) earn me a small commission (generally 3% to 15%) of the entire purchase
it's part of the advertising network BlogHer , also -- the company gives me ads to run on the site (lederboard and sidebar) and my site makes a few cents every time a unique visitor views the page. (This is a BLOG RING )
to a much lesser extent, Google Ads also -- the blog makes a few pennies if people click on specific links (but no purchase is required and no money is made based on traffic alone).
Matthew Hurst , a scientist at Microsoft’s Life Labs and co-creator of the blog search engine Blogpulse , used data from Blogpulse to visualize hyperlinks between blogs . His images show that there are a few thousand blogs clustered at the centre of the blogosphere linking to each other and to many other sites at the edge. Further analyzing this central cluster he found two sub-clusters, one focused on politics, the other focused on technology.
Rather than simply depicting links between sites, the image visualizes where people leave comments and how often, i.e. activity in the network that goes beyond reading updates. I believe this kind of analysis is very valuable. It reveals another layer of influence in social media: While social media is more democratic than traditional media, since potentially everyone with Internet access can raise her voice, the share of those who not only watch but actually create content is lower than you might expect.
The term "weblog" was coined by Jorn Barger  on 17 December 1997. The short form, "blog," was coined by Peter Merholz, who jokingly broke the word weblog into the phrase we blog in the sidebar of his blog Peterme.com in April or May of 1999.  Shortly thereafter, Evan Williams at Pyra Labs used "blog" as both a noun and verb ("to blog," meaning "to edit one's weblog or to post to one's weblog") and devised the term "blogger" in connection with Pyra Labs' Blogger product, leading to the popularization of the terms. 
On 6 December 2002, Josh Marshall's talkingpointsmemo.com blog called attention to U.S. Senator Lott's comments regarding Senator Thurmond. Senator Lott was eventually to resign over the matter.