How do seasons work?

Do they reset your rank every season? What is new about every season?

At the end of every season there's a partial reset based on where you placed:

• Master accounts will drop 800LP (8 divisions). 
• Diamond and Platinum accounts will drop 750LP (7 divisions + 50LP).
• Gold and Silver accounts will drop 675LP (6 divisions + 75LP).
• Bronze and Iron accounts will reset to Iron IV.

Right now, there's not much difference between seasons aside from the player icon you get as a reward at the end of it.  However, starting with the new expansion launching in late August, new cards will be introduced into the game every two months. That just so happens to be the length of a season.  When that happens, each new ranked season will feel like a brand new meta to try and figure out.

Quote From Zolgear

At the end of every season there's a partial reset based on where you placed:

• Master accounts will drop 800LP (8 divisions). 
• Diamond and Platinum accounts will drop 750LP (7 divisions + 50LP).
• Gold and Silver accounts will drop 675LP (6 divisions + 75LP).
• Bronze and Iron accounts will reset to Iron IV.

Right now, there's not much difference between seasons aside from the player icon you get as a reward at the end of it.  However, starting with the new expansion launching in late August, new cards will be introduced into the game every two months. That just so happens to be the length of a season.  When that happens, each new ranked season will feel like a brand new meta to try and figure out.

  

Ok that sounds cool about the new cards. I'm also glad to see they aren't just throwing a bunch of master level players into matches with new to the game Iron tier players. It's also nice that I won't have to far to climb to get back to where I am.