This psalm is a song about God's faithfulness. Parallelism is common in Hebrew poetry. (See: [[rc://en/ta/man/jit/writing-poetry]] and [[rc://en/ta/man/jit/figs-parallelism]])
This is a superscription that tells about the psalm. Some scholars say that this is part of the scripture and some say that it is not. (See "What are Superscriptions in Psalms" in [Introduction to Psalms](../front/intro.md).)
One of David's chief musicians had this same name. This may refer to him. See how you translated this in [Psalms 39:1](../039/001.md). (See: [[rc://en/ta/man/jit/translate-names]])