SuperCoins is the type of reward given by Flipkart on every eligible product ordered from its website and applications. SuperCoins are the part of Flipkart Plus Program. There are some conditions to join the Flipkart plus Program. You need to earn 300SperCoins to join the program.
How To Earn SuperCoins
You need to earn at least 300 SuperCoins to join the Flipkart Plus Program and you can earn the coin by two methods one is by ordering the product and the other is by availing the services of partners that are present on Flipkart. You can also earn SuperCoins by playing various games present in the Flipkart app.

A Non Plus Member will get a minimum of 2 SuperCoins on spending Rs 100 and get a maximum of 50 SuperCoins on a single order. Where a Plus Member will get 4 SuperCoins on spending Rs 100 and get a maximum of 100 SuperCoins on a single order. Which is double as compared to Non Plus Member.
How To Join Flipkart Plus Program
First of all, you need at least 300 SuperCoins to join the Plus Program. Once yu reached the threshold limit of SuperCoins then only you can join it.
Step 1: First of all launch your Flipkart App and tap on three lines at the top left corner of the screen.

Step 2: Now tap on Flipkart Plus Zone to join the Plus Program.

Step 3: Scroll down to see the Join Now, tap on it to become the Flipkart Plus Member.

Step 4: A congratulations screen will appear saying that you are now a Flipkart Plus Member.

Note: There is no alternate way to join the Plus Program. Means you need atleast 300 SuperCoins to join the become the plus member.