Standard Price is a price you define, sometimes called a list price. This is shown to all users of ONEzoo by default.
Tier Pricing is a set of pricing you can assign to a group of your customers, this might be as simple as a 10% off the list price, or might be assigned to a certain group of venues. Tier Pricing overwrites the Standard Price.
This is the final option, it will override both the standard price and the tier price. It’s used on a individual customer basis to give a specific customer the price they have negotiated with you.