This summary is not the rule. The rule text controls.
Every lawyer should try to give back by doing free or low-cost legal work for people who can't afford it. This might mean helping someone with a legal problem for no charge or at a reduced rate, especially if that person has limited income. It can also mean working with charities or public service groups that need legal help.
Lawyers can also meet this goal in other ways. They might volunteer their time to help improve laws or make the legal system work better. They could also donate money to organizations that provide legal help to people who need it but can't pay for it.
This rule is a recommendation, not something lawyers are forced to do. It reflects the idea that lawyers have special skills that can help people who might otherwise have no way to get legal help. For regular people, this means many lawyers are willing to offer free or discounted services, so it's worth asking if you qualify based on your income or situation.