After the Initial Setup some or all of your pages will contain ad tags, one or more on each page depending on how many ads you think are appropriate on those pages.
Each tag is a piece of Java Script that gets executed when you load the page in the browser. Upon execution, a call is made to the ad server -- which Municipal Media operates. In response, the ad server delivers an ad to the browser, one of the possibly many ads that are available at that time.
After the tags are placed, you will not have to do any more work as the Municipal Media team will take care of providing ads for your pages.