3:superscription—What is the purpose of the heading given to some of the psalms? The heading sometimes identifies the writer and/or provides information about the circumstances under which the psalm was composed, as is the case with Psalm 3. The superscription may also explain the purpose or use of the particular song (Psalms 4 and 5) as well as give musical instructions (Psalm 6).
3:2—What is “Selah”? This term is generally thought to represent a pause for silent meditation, either in the singing alone or in the singing and instrumental music. The pause was used to make the thought or emotion just expressed more impressive. There is no need to read the word aloud during public reading of the Psalms.