An animatic is essentially a rough draft of a film or sequence, consisting of simple storyboarded panels (loosely drawn images of each shot in a sequence) that are timed out, sometimes with a temporary soundtrack (voices, music and some sound effects), to make the final film's Blueprint.
KLAUS - From Storyboard to Final Version.
This video shows how production's working pipelines start with Storyboards at the first stage of the visuals and then go through an Animatic stage, before then going through all the later stages to end up with the final production version.
The storyboard panels, being turned into an Animatic, provides an important 'Blueprint' for the rest of the production. Getting it right early in the production is essential to ensure a successful animation project. Now is a good time for you to practice doing it.
Also check out this one too: https://www.cartoonbrew.com/feature-film/how-klaus-draws-on-centuries-old-artistic-principles-to-push-2d-animation-forward-182325.html
Remember you can do a 'stretch' task, once you have completed your storyboard, by turning it into an 'Animatic'.
An Animatic is a basic version of the film that uses the storyboard panel drawings, to show the key actions in the scenes.
Time is added to the drawings to show the duration of each scene, so the Animatic becomes the blueprint for the final film.
Watch this Jazza video to see how an Animatic can be made.
Another video from Jazza to show how Animatics can be put to good use. https://www.youtube.com/watch?v=BRgii-2Fbx4
This video runs through how to make animation, and also Animatics, in Photoshop.
A video rundown on how to make an Animatic in Animate:
A video rundown on how to make an Animatic in After Effects:
Watch the 'Animatic' and the final video running side by side, here.
Even rough drawings work well for an Animatic, as long as they communicate the story or message to the viewer.
A nice example of an Animatic.