Pall Mall 100s Blue is a brand of cigarettes known for their longer length (100mm) and a smoother, lighter taste compared to full-flavor varieties. Historically, Pall Mall is one of the oldest cigarette brands, introduced in 1899, and has gone through various iterations and ownerships, adapting to changing consumer preferences. One might consider trying it for a milder smoking experience or due to brand familiarity, though it's important to remember the inherent health risks associated with smoking.