We currently use Google to serve ads, which means you can advertise here via Google AdWords. It's a pretty good system for small advertisers, because you can set low ceilings on how much you're prepared to spend per day or per click.
This is how to create an ad that will display only on nationstates.net, nowhere else on the net.
- Log in or sign up to Google AdWords at https://adwords.google.com/
- Click "Campaigns"
- Click "+ New Campaign"
- You are asked to "Select campaign settings." Choose a name for your campaign, and various targeting options, such as which languages you wish your ad to display in.
- Under "Networks and Devices", for "Network" click "Let me choose...". This will show a few further options. Uncheck "Google Search", and check "Specific reach: Show ads only on pages that match all my targeting methods."
- At the bottom of the page, click "Save and continue"
- You are taken to a "Create ad group" page. Choose a name and have fun creating an ad. It can be text or image.
- Don't select any Keywords, but under "Placements", click to expand "Select managed placements" if necessary, and under "Enter as many placements as you like, one per line," type in "nationstates.net".
- Choose a number for "Default bid", which is the maximum you'll pay per click, and click "Save and continue to billing" (or, if you like, "Set up billing later")
- After that, you should be good to go. When viewing the Ad Group, clicking "Placements" should show that you have "nationstates.net" under "Managed Placements". Also, clicking "+ Change Display Targeting" should show you a single circle that is 100% shaded to indicate "Placements" (and no "Display Keywords")