Aharon shall put lots on the two he-goats; one lot for Hashem and one lot for Azazel.

עזאזל AZAZEL — (The word is taken to be a compound of עזז "to be strong" and אל "mighty"). It was a precipitous and flinty rock — a towering peak, for it is said (v. 22) "[and the goat shall bear upon it their iniquities into] an גזר) "ארץ גזרה means to cut) — into a craggy land (Yoma 67b).

וגורל אחד לעזאזל, “and one lot for Azazel.” This word is an alternate word for Samael, which means “Satan.” According to Rabbi Eliezer in Pirkey de Rabbi Eliezer chapter 46, we are commanded to assuage the feelings of Satan on that day so that he will not attempt to interfere with the effectiveness of our repentance. When the Jewish people can enlist even Satan’s silence at the throne of G-d, there is no greater bribery than this. We are bidden to enlist this so that our sacrifices are not going to be in vain due to his citing our shortcomings.

...Rabbi Samuel says that even though it is written that the goat offered as a sin offering is to be offered to God, the goat that was sent was also offered to God. There is no need for this interpretation, for the goat sent into the wilderness did not serve as an offering since it was not slaughtered. If you are able to understand the secret that follows Azazel then you will know its secret and the secret of its name, for it has comrades in Scripture. I will reveal a bit of its secret to you in a hint. When you are thirty-three, you will understand it.

They shall no longer slaughter their sacrifices to the se'irim after which they go astray. This shall be an everlasting statute for them, for their descendants.

And martens shall dwell there, and their houses shall be filled with ferrets, and ostriches shall dwell there, and satyrs shall dance there.

UNTO THE SATYRS. Se’irim (satyrs) are the demons. They are so called... because the insane see them in the form of goats (se’irim).

And the Se'irim. They are the demons, like "the se'irim after which they go astray", and they are called such because they appear in the form of goats to those who believe in them...

"To the Se'irim" -
Demons are called this because they are restless and leap like goats.

...they are called sheidim because they dwell in “devastated” (shadud) )places, such as the desert, and their principal habitat is in the far corners [of the earth], such as the northern extremity of the earth which is wasteland on account of the cold climate...

"This shall be an everlasting statute" - not to sacrifice to the Se'irim, even though they did not accept them as gods in any way, but desired their companionship so that the sheidim would be their servants and helpers in their businesses or missions to distant lands, as is mentioned [in the Talmud] about Yosef the Gremlin and the gremlin who was a regular in the home of Rav Ashi. However, regarding the demons - whose creation is not mentioned - it is worth considering that the sages called them Mazikim (destructive ones) and mentioned that they eat, drink, reproduce and die, and yet they see and are not seen...