Here we list the basic descriptions -- or "what is is" -- each attraction at Disney's Hollywood Studios:

Disney's Hollywood Studios What it is
Attraction What It Is
BB-8 Astromech on Duty BB-8 Character Greeting
Beauty and the Beast - Live on Stage Live Hollywood-style musical
Celebrity Spotlight Character Greeing
Disney Junior - Live on Stage! Live show for children
Disney Movie Magic Projection Show
Encounter Kylo Ren at Star Wars Launch Bay Character Greeing
Fantasmic! Mixed-media nighttime spectacular
For the First Time In Forever: A Frozen Sing-Along Celebration Sing-Along
Indiana Jones Epic Stunt Spectacular! Movie-stunt demonstration and action show
Jedi Training: Trials of the Temple Outdoor stage show
March of the First Order Stormtroopers Marching
Meet Chewbacca at Star Wars Launch Bay Character Greeing
Muppet*Vision 3D 3-D movie starring the Muppets
Rock 'n' Roller Coaster Starring Aerosmith Rock music-themed roller coaster
Star Tours: The Adventures Continue Indoor space-flight-simulation ride
Star Wars Launch Bay Movie Exhibits and Character Greetings
Star Wars: A Galactic Spectacular Fireworks and Projections with Star Wars Music
Star Wars: A Galaxy Far, Far Away Star Wars Stage Show
Star Wars: Path of the Jedi Short Movie
The Twilight Zone Tower of Terror Sci-fi-theme indoor thrill ride
Toy Story Midway Mania! 3-D ride-through indoor shooting gallery
Voyage of the Little Mermaid Musical stage show featuring characters from the Disney movie The Little Mermaid
Walt Disney Presents Tribute to Walt Disney

"What It Is" at Other Parks