Here are some alternative translations which will help you to understand this phrase. In King James English, the word "meet" means "fit" or "appropriate".
Genesis 2:18
KJV And the LORD God said, It is not good that the man should be alone; I will make him an help meet for him.
NKJV And the LORD God said, "It is not good that man should be alone; I will make him a helper comparable to him."
NLT Then the LORD God said, "It is not good for the man to be alone. I will make a helper who is just right for him."
RSV Then the LORD God said, "It is not good that the man should be alone; I will make him a helper fit for him."
I hope you have found this helpful.
God bless,
Mike