This summary is not the rule. The rule text controls.
This rule gives the court the ability to change its own procedures whenever it needs to. If following the standard rules would lead to an unfair result, the court can adjust or update those rules to make sure justice is served.
This means the process is not completely rigid. The court has room to make changes when a situation calls for it, rather than being stuck with a rule that doesn't fit the circumstances. The goal is always fairness, not just sticking to procedure for its own sake.
For people involved in a case, this means the court has flexibility. If something unusual comes up, the court can adapt its procedures to handle it properly, instead of being locked into rules that might not work well for that particular situation.