The combination of ingredients, and their measure, are important for dishes to taste good, to look good and to smell good.  This is also true for perfumes.
The LORD God gave Moses specific ingredients and their measurements to make a holy anointing oil.  Proportions, sequence of adding ingredients – a skilled, knowledgeable perfumer was needed.

This “holy anointing oil” would be a “picture” of God setting apart His chosen Messiah.
(NASB) Exodus 30:25 “You shall make of these a holy anointing oil, a perfume mixture, the work of a perfumer; it shall be a holy anointing oil.”

The oil was to be used only for consecrating items and consecrating people for service to God.
What would this “holy anointing oil” be used for?  The tent of meeting and the ark of the covenant would be consecrated with this special oil.

The table of showbread and the lampstand, the altar of incense, the altar of burnt offering and the laver and its stand would be anointed, consecrated with this holy oil.

Aaron, the high priest and his sons who served as priests would also be anointed with this holy oil.

Messiah!  Anointed One of God was anointed;
He was consecrated, to serve as High Priest and as King.

Prophecy of Messiah!  Anointed One of God – to serve as High Priest!
(NASB) Hebrews 9:11 “But when Christ appeared as a high priest of the good things to come, He entered through the greater and more perfect tabernacle, not made with hands, that is to say, not of this creation;
12 and not through the blood of goats and calves, but through His own blood, He entered the holy place once for all, having obtained eternal redemption.”
(Underlining added)

Prophecy of Messiah!  Anointed One of God – to serve as King!
(NASB) Psalm 45:6-7 “Your throne, O God, is forever and ever;
A scepter of uprightness is the scepter of Your kingdom.
7 You have loved righteousness and hated wickedness;
Therefore God, Your God, has anointed You
With the oil of joy above Your fellows.”
(Underlining added)

~ Take it to heart ~

~ Jesus ~
Chosen, Anointed, Consecrated to be Messiah!
Messiah! The Anointed One of God!
Is He your Savior and God?