Using Gravity Forms conditional logic you can show or hide fields based on values of previously filled fields, determine when to use a form confirmation or notification and also when a feed is fired or not (e.g. Stripe, PayPal, MailChimp, etc…).
In certain use cases what you really want to check is not a concrete value but if the field is just empty, no value entered, or the opposite, if it contains any value.
Doing this it’s very easy and I would say obvious. But despite this, it’s very common to see people wondering how to do this.
All you need to do is to use the is or is not operators and leave empty the input for the value in your condional logic rule! :)