A lawyer can conduct legal research on your behalf and help prepare your case for trial if needed. This may involve collecting evidence, retaining witnesses, writing briefs, and arguing for you before a judge. If they are assisting you with a transaction, they can help you negotiate the deal in a way that protects your interests. Your lawyer should advise you on your rights and obligations, communicate with you clearly and promptly, and meet appropriate ethical standards. In addition to representing you zealously, they must follow applicable rules of court and respect judges and adversaries.