Why does kara zor el travel across the galaxy in supergirl?

In DC Comics and the Supergirl television series, Kara Zor-El's journey across the galaxy stems from her origins as Superman's Kryptonian cousin sent to Earth. In the TV show specifically, her space travel often serves to investigate alien phenomena threatening National City and Earth. Throughout various episodes and seasons, Kara ventures to other planets, alien colonies, and even alternate dimensions to confront villains like the Dominators, Cadmus, and otherworldly threats. These missions frequently tie into her ongoing quest to understand Krypton's legacy and prevent similar tragedies from befalling other worlds. Her galactic travels also reveal broader universe connections, introducing alien species, advanced technology, and cosmic-level dangers that expand beyond Earthly concerns. Additionally, these journeys help Kara connect with her heritage while establishing alliances with alien civilizations that become crucial in larger story arcs.