This summary is not the rule. The rule text controls.
When you disagree with something a judge decides during your case, you don't need to use any special legal language or formal procedure to preserve your right to challenge it later. You just need to clearly tell the judge what you want them to do, or what you're objecting to, and explain why.
This means if the judge makes a decision you don't like, you can simply speak up and say something like "I object to this because..." and give your reason. You don't have to worry about using the exact right legal phrase or following an old-fashioned formal process. The court just wants to know what action you're asking for or pushing back against, and why.
The rule also protects people who didn't get a fair chance to object when a decision was made. If the judge ruled on something without giving you an opportunity to speak up at that moment, you don't lose your right to challenge it later just because you didn't object right then. This makes sure people aren't penalized for circumstances beyond their control.