Conversion Tag tool to create AMO tags - you need to create a distinct conversion tag for each set of transaction properties you wish to track. YOu can access it here Search/Dispaly/Social > Tools & Settings > Conversion Tags
Tracking URL tool to manually generate click tracking URLs. However, basis the tracking options defined in your account setting, AMO can generate a destination URL hence you might not need this tool.
Decode Tracking URL tool basically gives you the core URL and removes the AMO code from it.
Feel free to let me know if you have more questions.