The document discusses different types of signs used in gig and CD release posters: Iconic signs feature recognizable images of artists to appeal to fans and grab attention. For example, Katy Perry's poster prominently featured her image. Indexical signs require deeper analysis, appealing to more educated audiences. The Pretty Reckless poster symbolically represented the lead singer's religious background. Symbolic signs leverage universally understood connections, like a STEPS Christmas tour poster depicting the band in white costumes with falling snow symbolizing winter.