An effective advocate is someone who argues or stands up for a cause in a way that gets positive results and convinces others to support their cause. They are good at explaining their ideas and convincing others to agree with them. Full definition
I have developed a broader sense of the potential for the postdoc experience, and I anticipate that it will help me be a more effective advocate for postdocs as a faculty member. (sciencemag.org)
Parents are far more effective advocates for their children — and for other children in their community — than charter school leaders or policy experts or professional advocates. (educationnext.org)
However, our lawyers have a wide variety of litigation experience and serve as effective advocates in complex matters. (bennettgastle.com)