Throughout the verses before, God reminds the Israelites of His promises to dispel their doubts and also address their lack of reverence for Him. In verse 11, we have a sort of summation of the verses before and the ultimate purpose of His promises. His name will be glorified and known throughout the nations.
Are we not recipients of the promises God made long ago? Jesus was a descendant of the Israelites, the chosen people that God specifically chose, protected, guided, and loved. Without God delivering on His promises, this would be a different story. His faithfulness led to the birth, death, and resurrection of our Savior. We now get to be recipients of His mercy and unconditional love and take part in making Him known across all nations. Praise be to God!