Adobe Illustrator is a vector graphics editing software that is commonly used for creating and editing illustrations, logos, icons, and other design elements. It can also be used for creating frame-by-frame animations, although it’s not specifically designed for that purpose.

To learn Adobe Illustrator, you can start by exploring the software’s built-in tutorials and help resources. Adobe also offers official training courses and tutorials on their website, as well as a wide variety of online tutorials and resources.

As for best practices, here are a few things to keep in mind when using Illustrator:

Keep your file organized by using layers, groups, and naming conventions.
Use vector shapes and paths to create your artwork, instead of bitmap images.
Use the pen tool to create clean and precise paths.
Use the align and distribute tools to keep your artwork symmetrical and consistent.
Use the appearance panel to add multiple fills, strokes and effects to an object.
Create symbols for frequently used elements
Use the Transform each option to make identical changes to multiple objects
Use the Live Trace tool to turn bitmap images into vector artwork

Keep in mind that Adobe Illustrator is a powerful tool and requires some time to master, but with regular practice, you will be able to create professional-looking illustrations and designs in no time.