What it does
Revia is a medium-strength disjunctive. It breaks up long sub-clauses, weaker than Zakef Katan but stronger than Pashta. You'll hear Revia in verses with a lot of clauses stacked together, where the reader needs more breath stops than the basic Etnachta + Sof Pasuk skeleton provides.
Where it appears
Common in longer verses with multiple clauses. Often preceded by Munach. The pattern Munach-Revia is another foundational sequence, parallel in feel to Munach-Zakef.
How to remember it
The mark is a single small dot above the letter, like a diamond or rhombus. The name Revia comes from a root meaning "fourth" or "quartered," reflecting its position in some classical orderings of the trope hierarchy.
Example from the Torah
Devarim 6:7
In a long verse like Devarim 6:7, Revia helps the reader subdivide the list of when to speak Torah ("when you sit, when you walk, when you lie down, when you rise"). Each clause gets its own beat.
Hear the melody
A synthesized rendering of the melodic shape, not a vocal recording. For a baal koreh's voice on a full aliyah, PocketTorah is a great free resource.
Hand signal (simanim)
Often confused with
Both are medium-strength pauses above the letter. Zakef Katan uses two stacked dots; Revia is one. Functionally similar; either can be the strongest disjunctive in a sub-phrase.