Using Mantra or even the repetition of certain phrases in Pali is usually a hugely typical sort of meditation during the Theravada tradition. Simple mantras use repetition of your Buddha's title, "Buddho", [as "Buddho" is definitely a title instead of a reputation] or use the "Dhamma", or maybe the "Sangha", https://www.youtube.com/shorts/x-uzzNOcLMQ