Actions speak louder than words means that it is better to do something than merely talk about doing it.
1. The Chief Fire Officer did not believe in dawdling around and waiting for the policemen to make up their mind; by rescuing the child his actions spoke louder than words.
2. The trekking group quickly made a rope line from their scarves to prevent anybody from getting lost. Their actions spoke louder than words.
3. The celebrity immediately handed over a cheque to the NGO on hearing about their financial problems; his action spoke louder than words.