Question about Levels and Giveaways

Both your questions are answered in the FAQ.
Also see here.

1. Unbundled games give 100% of their retail value as CV. Bundled games give 15%, and free games give 0%. When creating a giveaway, no asterisks next to a game's title (in the "Select a Game" field) is unbundled, one asterisk is bundled, and 2 asterisks is free.

2. https://www.steamgifts.com/discussion/XaCbA/list-of-all-cv-levels-and-their-corresponding-real-cv

You can also read here under "What are levels, and how can I increase my level?"

One more question!

What's the (average?) rate of Points given per day or week?

How many $USD of giveaways does it take to reach each of the levels? (or just level 1 if that is too much work)

For level 1 you just need one game or $1.

Other levels you can check here

To add to Tzaar's comment, a "bundled" game is any game that reaches 95% off in any region. Due to games being manually added to the free/bundle game lists by a single individual, tagging can be delayed (but is retroactively applied to the start of the promotion once it is implemented). If you plan on putting up an unbundled game at any point, you may want to ask for advice at that time on how to minimize the risk of not getting full CV. For bundled games, it's rare that they coincide with a free promotion, but the SG Deals thread nearly always covers those, so a quick glance at the thread for recent deals before posting a giveaway would be enough to reasonably cover your bases.

Welcome to the site (or at least, welcome to being active on it). ^.^

Hi,
you can plan your giveaways with this tool: OSS - OSS - Tool to plan Steamgifts giveaways. It's a Spreadsheet (excel, openOffice) designed to give you the real value of your actual and future giveaways. It will tell you how many CV you need to reach the next level or a level of your choice... and a lot more (like the cost of your giveaways).