Good/Better/Best pricing is the practice of offering increasingly better versions of a product at progressively higher price points.
The goal of this pricing tactic is to sort buyers based on how price-sensitive they are. Quality-sensitive buyers will opt for a better quality, more expensive version. Price-sensitive buyers will choose a less expensive, lower quality version. The result is an increase in both sales and profits.
But good/better/best pricing​ will not work if you create versions of your product that are better in some ways but worse in others. This makes it difficult for buyers to compare the versions and decide which one is better.
An easy way to create a clearly better version of your product is to follow the everything and more rule. This means keeping all of of the features and benefits of one version and adding something extra buyers desire to create a new, better version. The something extra can be either more of an existing feature or an additional feature.
You can then use the equal price test to determine if you’ve succeeded in creating better quality version of your product. If two versions of your product where offered at the same price, would pretty much every buyer agree that one version is preferable to the other? If yes, you have successfully created a better quality version of your product. And you can charge more for that version.
Read more in The trick to making good/better/best pricing work.