Magic in Dungeons & Dragons is often thought of as something studied and learned, a craft that the player character chose to pursue out of interest or need for power. Wizards dedicate their lives to the pursuit of understanding magic, while Warlocks offer themselves to powerful entities in exchange for abilities beyond their wildest dreams. For Sorcerers, magic is in their very blood.
Source:https://www.cbr.com/dnd-5e-sorcerer-origins-ranked/