This summary is not the rule. The rule text controls.
If a default judgment has been entered against you, meaning the court ruled against you because you didn't respond or show up, you may be able to get that judgment canceled. To do this, you need to show the court a good reason why the default should be set aside.
The court will look at your request using the same standards found in Rule 60.02. That rule lists specific reasons a judgment can be overturned, such as a mistake, new evidence that wasn't available before, fraud by the other side, or other circumstances that make it unfair for the judgment to stand.
This means you can't just ask the court to undo a default judgment because you changed your mind or found it inconvenient. You have to point to a real, valid reason recognized by the rules. If the court agrees your reason is good enough, it can cancel the default judgment and let the case move forward normally, giving you a chance to respond and defend yourself.