Psalms 83:18

Then they will know
After the preceding jussives (v. 17), the prefixed verbal form with prefixed vav (ו) indicates purpose (“so that they may know”) or result.
that you alone are the Lord,
Heb “that you, your name [is] the Lord, you alone.”

the sovereign king
Traditionally “the Most High.”
over all the earth.

Psalm 84

Psalm 84. The psalmist expresses his desire to be in God’s presence in the Jerusalem temple, for the Lord is the protector of his people.

For the music director; according to the gittith style; written by the Korahites, a psalm.

18
The precise meaning of the Hebrew term הַגִּתִּית (haggittit) is uncertain; it probably refers to a musical style or instrument.
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