Why should you care about the basics of badminton?
If you don't master your badminton basics, you will probably not be able to perform advanced shots.
Basic Footwork
Good footwork allows good movement around the court. Learn the basics of covering the court to defend against your opponents' shots!
Basic Badminton Strokes
If you are not using the correct technique for your strokes/swings, you will be unable to execute beautiful drop shots, smashes or lobs (high shots)
Badminton Serve
Master the correct techniques to deliver good serves. Good technique during badminton service can give you an edge over your opponent.
Basic Stance
A good stance sets you up to defend and attack effectively during a game! This is one of the most important basic skills you should learn.
Therefore I highly suggest that you DO NOT rush into learning all these advanced skills... yet.
Before you do that, master the basics. Then train correctly, then train and train and train.
You will passively gain advanced skills when you master the basics because strong basic skills ARE considered ADVANCED SKILLS.
Like what I've said, master your basic badminton skills and you will become an excellent player. Important badminton skills and techniques include:
Clear/lob (high shots)
Lobbing can be used as an offensive or defensive shot. Learn the techniques to execute a badminton clear/lob.
Drop Shots
Learn this deceptive shot to trick your opponent and win a point!
Smashing
The most powerful and (almost) unstoppable shot in the game -- learn the correct smashing technique... and executing a smash with power will be easy.
Net Play
Dominate the front area of the court by having good net playing skills. Learn techniques such as the tumbling net shot.