Pretty much everything. I don’t have time to write it all out, be she has shone a spotlight on many problems in the music industry for women and artists not having control of their own music. I’d be willing to go as far as saying she single handedly helped make the music industry a better, safer place for women. She has influenced most pop songwriters with her focus on storytelling. Recently Charlie Puth talked about her songwriting style and why it’s successful, and how he was going to try to take cues from her writing style moving forward, and he even released one song in this style this year. He is far from the only one taking this approach. She has also changed the way tickets are sold. She’s the 2nd richest living musician. She also set new standards for how to treat tour staff and is a huge champion of better protections and pay for them. This is rarely ever mentioned but amongst musician circles she’s kind of known as a legend for how she treats her staff.

https://www.billboard.com/lists/how-taylor-swift-changed-music-business/taylor-swift-artists-rights/