Mahjongg Solitaire has certain factors which have appeal to those in the AARP community:

Intellectually Challenging: Fitting together tiles and making plans regarding future moves ensures that one’s mind remains sharp.
Relaxing & Soothing: As a result of the repetitive nature of matching tiles one can relax, reduce stress, and enhance mental health.
Socializing Friends and Family Around the World: There are online platforms where players gather to play with family members, friends, or other players from all over the world. AARP Mahjongg
Easy to Learn Hard to Master: Beginners can quickly learn how to play because the basic rules are simple enough. However, there are deeper tactics that entail advanced gaming skills needed to keep it interesting.
Fast-Paced Adventure Game: These games will be shorter, more intense periods when the desired action is achieved promptly by player completion.