The people in the world around the people of God (Israelites) were worshipping idols. Objects made by man of Gold, silver, stone statutes and objects. The Lord had inspired the writer of this Psalm to write: don’t trust in something made by man that can’t speak, hear, feel or walk.
He says this to them: Psalm 115:9 (NRSV) 9 O Israel, trust in the LORD! He is their help and their shield.
What the Lord is telling them is to put your trust in Him—the maker of heaven and earth. It’s the Lord that is your help and protection in difficult times.