BodyGyro cannot be found when try to insert it

Help! When I type bodyGyro in the insert box, I cannot it!

body gyro is deprecated you should use AlignOrientation

what does deprecated means???I use a lot of body velocity ect in my game =(

they are still useable but not recommended to use for new work
if you really need BodyGyro you can create it using command bar"BodyGyro", game.Workspace)