Although they were the son and daughter of Zeus, Apollo and his twin sister Artemis were born under threats from the goddess Hera. Zeus’ wife Hera never forgave the twins’ mother – the nymph Leto – for her union with the King of Mount Olympus, and she forced Leto into exile.

God of the Sun, the Light, the Music and Prophecy

Apollo is one of the most complex and important gods, and is the god of many things, including: music, poetry, art, oracles, archery, plague, medicine, sun, light and knowledge. He is the son of ZEUS and the TITAN LETO, and was born in the Greek island of Delos, along with his older twin sister ARTEMIS – goddess of the hunt.

Apollo is the ideal of the kouros, which means he has a beardless, athletic and youthful appearance. He is also an oracular god as a patron of Delphi and could predict prophecy through the Delphic Oracle Pythia.

Both medicine and healing are associated with Apollo and were thought to sometimes be mediated through his son, Asclepius. However, Apollo could also bring ill-health and deadly plague.

Apollo also became associated with dominion over colonists, and as the patron defender of herds and flocks. He was the leader of the Muses (also known as Apollon Musegetes) and was director of their choir – functioning as the patron god of music and poetry.

The god HERMES create the lyre for Apollo and this instrument became a known attribute for him. When hymns were sung to Apollo they were called paeans ( not the GREEK GOD PAEAN ) 

Apollo had a twin sister Artemis

Artemis is the Olympian goddess of the hunt, the moon, and chastity; in time, she also became associated with childbirth and nature. No more than few days old, she helped her mother Leto give birth to her twin brother Apollo. Artemis was very protective of her and her priestesses’ innocence. Consequently, she wasn’t very nice when some of them weren’t so careful.

Homer calls Artemis either “The Mistress of Animals” or “She of the Wild.” As a huntress, she is also often referred to as “arrow-pouring” or “deer-shooting.” Just like her brother, she may be occasionally called “bright” or, even more, illustrative of her function as a moon goddess, “torch-bringer.”
Source: https://www.greekmythology.com/Olympians/Artemis/artemis.html

Apollo is the Olympian god of the sun and light, music and poetry, healing and plagues, prophecy and knowledge, order and beauty, archery and agriculture. An embodiment of the Hellenic ideal of kalokagathia, he is harmony, reason and moderation personified, a perfect blend of physical superiority and moral virtue. A complex deity who turns up in art and literature possibly as often as Zeus himself, Apollo is the only major god who appears with the same name in both Greek and Roman mythology.
multifaceted god adored all over Greece as the perfectly developed classical male nude, the kouros. Beardless and athletically built, he is often depicted with a laurel crown on his head and either a bow and arrow or a lyre and plectrum in his hands. The sacrificial tripod – representing his prophetic powers – was another common attribute of Apollo, just as few animals linked with the god in various myths: wolf, dolphin, python, mouse, deer, swan.

Apollo is the son of Zeus and Leto. As one of the numerous Zeus’s lovers, his mother incurred the wrath of Hera, who sent the dragon Python to pursue Leto throughout all lands and forbade her to give birth anywhere on solid earth. Nobody would accept the pregnant Titaness, except for the island of Delos, where Leto first delivered Artemis while balancing her body on an olive branch. Afterward, Artemis helped her mother deliver Apollo as well.
Source: https://www.greekmythology.com/Olympians/Apollo/apollo.html
Hera was top goddess and protector of marriage. She despised adultery–especially Zeus’s adultery.

Not long before, Hera had tried to chain Zeus to prevent more adultery, but he chained her–suspended fore a cloud. Zeus released hera but theirs remains a bad relationship.

Angry at zeus infidelity with Leto, she defies all gods and goddesses not to harbor pregnant leto.  She called Python the serpent up from the depth of the earth, and she sets it upon the heels of leto. Leto wanders in exile. She reaches an island in aegean sea – Asteria – That had been where her sister had jumped out of shame because of zeuss. Island formed there is called Delos.

ASTERIA was the Titan goddess of falling stars and perhaps of nighttime divinations such as oneiromancy (by dreams) and astrology (by stars). She was the mother of Hekate (Hecate), goddess of witchcraft, by the Titan Perses.

After the fall of the Titans, Zeus chased Asteria across the sky but she escaped him by transforming herself into a quail and leaping into the sea to became the island of Delos. Her sister Leto later gave birth to Apollon on the isle.

Zeuss sent apollo a lyre, a bow and arrow,

Zeuss hitches his chariot to two swans to go to buiold his temple and serve his people., but the swamns had a different plan. They took apollo to their own land Hyperborea/

HYPERBOREA was a fabulous realm of eternal spring located in the far north beyond the home of the north wind. Its people were a blessed, long-lived race untouched by war, hard toil and the ravages of old age and disease.

Hyperborea was usually described as a continent-bound land bordered on the north by the great, earth-encircling river Okeanos (Oceanus), and on the south the peaks of the legendary Rhipaion (Rhipaean) Mountains. Its main river was the Eridanos whose banks were lined with amber-weeping poplar-trees and its waters home to flocks of white swans. Blessed with eternal spring, the land producing two crops of grain per year, but most of the countryside was wild and covered with beautiful forests–the so-called “garden of Apollon.”

The southern border of Hyperborea was guarded by the bitterly cold peaks of the impassable Rhipaion (Rhipaean) mountains–home to Boreas (the North Wind) whose chill breath brought winter to the lands of the south. Its peaks were inhabited by gold-guarding Grypes (Griffins) and its valleys by the fierce, one-eyed Arimaspoi tribe. Beneath the southern slopes lay Pterophoros–a desolate, snow-covered land cursed with eternal winter.

Hyperborea was a theocracy ruled by three priests of the god Apollon. These gigantic kings, known as the Boreades, were sons of Boreas (the North Wind). Their capital contained a circular temple dedicated to the god where hecatombs (a hundred-head) of asses were sacrificed in his honour. The people also celebrated their god in an eternal festival of music, song and dance whose hymns were joined by the sweet song of the circling Hyperborean swans.

The realm plays a role in several myths. Phaethon tried to drive the chariot of the sun but lost control and was struck down by Zeus, sending his flaming body plummeting into the Hyperborean river Eridanos. His mourning sisters, the Heliades, were afterwards transformed into amber-shedding poplar trees on its banks, and his grief-stricken friend Kyknos (Cycnus) into a swan. Elderly Hyperboreans commemorated the event by leaping into the lake formed by Phaethon’s fall to be transformed into white swans.
Perseus later travelled to Hyperborea and was entertained by its folk when he was searching for the Nymphs who guarded the treasures of the gods, or else the Graiai–swan-bodied hags who could reveal the location of Medousa.
Perseus’ descendant Herakles made the same journey on two separate occassions. The first time was in his quest for the golden-horned deer of Artemis which fled north during the chase. The second time he sought Atlas and the golden apples of Hesperides.

Another body of stories describes Hyperboreans as pilgrim-founders of several important Greek shrines. The Delians told a tale of how the pregnant goddess Leto came to the island from Hyperborea accompanied by a pack of wolves where she gave birth to Apollon with the assistance of Eileithyia who was summoned from the northern realm to further the labour. After this event, the Hyperboreans sent pilgrims to the island–five men and several maiden-priestesses. However, after several of the maidens were either raped or killed, the Hyperboreans ended the pilgrimage and instead delivered their offerings indirectly through neighbouring tribes and peoples.
The next major shrine connected with the Hyperboreans was the oracle of Apollon at Delphoi. The second of the early, mythical temples of the shrine was said to have been built by Hyperborean pilgrims out of beeswax and feathers. When the army of the Gauls tried to seize the temple in historical times, phantoms of these prophets were said to have appeared on the battlefield, routing the army.
Finally they appear in the myths of the founding of the Olympic Games. It was said that when Herakles–either the Daktylos or the son of Zeus–established the festival in honour of Zeus he made a pilgrimage to Hyperborea to obtain sacred wild olives for the shrine.
The most famous prophet of the Hyperboreans was probably Abaris who was given a magical arrow by the god Apollon on which he flew around the world performing miracles. Some say this arrow was the one which Apollon had used to slay the Kyklopes (Cyclopes) which had been hidden beneath a Hyperborean mountain.

Zeuss proceeds to spot at the foot of Mount Parnassus