The LEGO Dots Bag Tag theme is a subtheme of the larger LEGO Dots line, focusing specifically on customizable bag tags. These sets allow users to create and personalize bag tags using a baseplate and a variety of colored and decorated tiles. The primary intent is to enable individual expression and design, allowing users to frequently update or modify the look of their bag tags. These sets merge functionality, as the tags can be attached to bags or backpacks, with the creative potential of the LEGO Dots system.