Reverb adds a sense of reflections and space around a sound. invideo Editor’s audio-effect list includes Plate Reverb and Verb One. Consider reverb when a sound feels too dry or disconnected from the environment or creative treatment.
Listen to the tail after the sound ends and how it overlaps with the next moment. Keep dialogue understandable and avoid allowing a large tail to obscure a cut or musical accent. Adding reverb is not a way to remove room echo already present in a recording.