Im trying to connect the stairs (supposed to be amphitheater seats" to the curve of the building but cant seem to do it. Is there a way where I can make the seats/stairs follow the curve’s shape? Below is the skp file. Would appreciate the help 
AMPHITHEATER 222.skp (6.7 MB)
hello,
you can use the follow me tool.
create the profile of your bleacher, and the 2D shape that matches the building patio.
note that the way you designed it, the spacing between rows is too narrow. You’d need at least 80cm in between rows.
(NB : on sketchup for schools / sketchup web, you won’t have the same palette than in my GIF, but you have this very same follow me tool on the left toolbar)