These are typically labels for "release groups" or the specific websites hosting the file. They act as branding for the entities that rip and upload the content. Lucifer S06 E05:

To enjoy the high-quality cinematography, vibrant colors, and crisp audio mixing of Lucifer safely, the official platform is the best option. Streaming on Netflix

As the fifth episode of the final season, "The Murder of Lucifer Morningstar" is a pivotal chapter in the Lucifer saga. The season picks up after Lucifer has decided not to become God, and this episode throws the central characters into a high-stakes mystery involving their own future.