What is the prime meridian and why does it matter?

The Primeridian - Drop the Needle (Official Video)

What exists at the place where Equator and the Prime Meridian cross each other? ‍♂️ #geography

Hang On (Nicolay Remix), by the Primeridian

Primeridian - Musical Mirages

The Primeridian - Wordz Of Wizdom (Ft. Kronikerz)

Change The Meridian by Primeridian