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).)
The abstract noun "strength" can be stated as "strong." Alternate translation: "God who causes us to be strong" (See: [[rc://en/ta/man/jit/figs-abstractnouns]])
Here "Jacob" represents all of his descendants. Alternate translation: "the God of Israel, the nation of Jacob's descendants" (See: [[rc://en/ta/man/jit/figs-synecdoche]])