In Greek mythology, Cerberus was an extremely ferocious three-headed dog monster that guarded the gates of hell. The reason Cerberus has 3 heads is because each head represents the past, present and future.
The three-headed dog monster Cerberus in Greek mythology was described as the “pet” of the hell god Hades.

Cerberus 3-headed dog also scares people by its scary snake tail.
According to Greek mythology, the reason Cerberus has three heads is because each head represents the past, present and future . Cerberus three-headed dog also scares people by its scary snake tail.
Cerberus’s three-headed dog is to guard the gates of hell at Tanaerum. This mythical creature will prevent those trying to escape from hell by swimming across the River Styx. However, in some cases, Cerberus failed to complete the task of guarding the gates of hell.
The reason is that thanks to the guidance of the gods or being lured by fresh meat, some mortals can fool Cerberus into getting in and out of hell easily. Despite having to look after the gates of hell, Cerberus still longs for a human head.

Cerberus’s three-headed dog is to guard the gates of hell at Tanaerum.
The three-headed dog Cerberus also became a challenge for the hero Hercules. Specifically, according to legend, Hercules was allowed by the god Hades to bring the three-headed dog Cerberus back to earth, but he was only allowed to fight empty-handed. For Hercules, this challenge is not difficult when this demigod hero can easily conquer this beast.