My first time enrolling in 401k and I'm confused with this part:

I opted for the traditional 401k instead of the roth 401k
employer matches up to 6% of your eligible compensation that you elect as Pre-tax, After-tax or Roth contributions. When you contribute to your plan, your employer matches 100% of the first 2% of your pay, and 50% of the next 4%.
My base salary is $50k/year NOT including any OT
I think I maybe in the 25% tax bracket
I'd appreciate any help.