Can someone explain the token metrics to me?

Specifically I don't know what the liquidity reserve is or what it's used for.

The team gets 18% and the company holds 20% - what's the 20% held for?

It seems like a lot of tokens are held by company/team (20% +18% + 9% = 47%).

Also, 4 year vesting with 1 year cliff means the tokens will be released in intervals of 1 year with the last portion released in 4 years, correct? Is it implied that it's a proportionate amount at each cliff, eg 4 years = 25% every time.

Thanks.