Progress indicators are animated helpers that indicate waiting time as content loads.
Progress indicators inform users about the current loading state, giving them insight into the process. Progress indicators may be determinate or indeterminate.
Determinate progress indicators indicate how long the process will take. They should be used once there is an estimate of wait time available.
Indeterminate progress indicators indicate an unknown amount of time the process will take. They should be used when there is not an estimated wait time available.
Linear progress indicators are great to focus attention to an area. They are great for places like empty pages, at the bottom of the topbar and in cards and in lists.
Circular progress indicators are great for places like icons and empty pages. They should be used for short waiting times.
Dot progress indicators are for use within buttons.
Star progress indicators are to be used on splash screens and empty pages only.