There are many great plugins to manage advertising, I decided to try WP Pro Advertising System because I wanted the ability to place ads on multiple websites, including WordPress sites and sites that I had created with Dreamweaver. WP Pro Advertising System has Post Tags (short code), Template Tags, and iFrame Tags. For simple rotation ads there are other options and for banner ad management there are other options, but this plugin seems to do it all (with optional add-on plugins).
That said, I am just learning to use this WP Pro Advertising System plugin and I have not found the documentation to be totally helpful. There is a Video Tutorial available, and it covers the basics, but it leans more towards using the plugin with the optional selling-banner ads plugin, and to begin with I only want to place and manage affiliate ad code. So I am making notes as I go along, to help myself and to hopefully help others with using WP Pro Advertising System.