This tag will generally refer to the highest degree of glory in the Plan of Salvation as recorded in 1 Corinthians 15:40. It was revealed to the prophet Joseph Smith that

“They are they who are the church of the Firstborn. They are they into whose hands the Father has given all things – They are they who are priests and kings, who have received of his fullness, and of his glory; And are priests of the Most High, after the order of Melchizedek, which was after the order of Enoch, which was after the order of the Only Begotten Son. Wherefore, as it is written, they are gods, even the sons of God – Wherefore, all things are theirs, whether life or death, or things present , of things to come all are theirs and they are Ghrist’s, and Christ is God’s. And they shall overcome all things. Wherefore, let no man glory in man, but rather let him glory in God, who shall subdue all enemies under his feet. These shall dwell in the presence of God and his Christ forever and ever.”

Also in Romans 8:16 – 17

The Spirit itself bearth witness with our spirit, that we are the children of God: And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be glorified together.