XP and Skill Questions

Hi I'm new to CreepTD and I would like to ask a few questions.

1. What is XP?
2. What does it do?
3. How do i get more of it?
4. What is Skill?
5. What does it do?
6. How do I get more of it?

Thank you.

[dcode]

1. XP are flat "experience" points you gain through playing or betting on the outcome of a game as a spectator
2. Your player rank and rank icon are calculated from your overall earned XP
3. Through playing and not being game over as the first player
4. It's your playing skill calculated by who you won or lost against (see: ELO rating system)
5. It shows your skill level in comparison to the other players (higher values are better)
6. Win more often, at best against players with a higher skill value than your own

Hope I could help

Thank you.