how I can level my account?

You need to do giveaways for games that don't have two *.
Also more info here.

FAQ

-Contributor Value and Levels

What is contributor value?

Contributor value is a number that estimates the value of your giveaways within our community. When you give away a game, and the winner marks your gift as "Received", the value of the game is added to your contributor value. If your giveaway was assigned "No Value", or "Reduced Value", the value of the game would be adjusted prior to being added. There are also two other factors that may influence the value of your giveaway.

    After you give away a game 5 times (whether in the same giveaway, or in multiple giveaways), it will begin decreasing in value. The value is decreased by 10% for each additional copy. This means if you decide to give away 8 copies of a $10 game, it would add $74.39 (10 + 10 + 10 + 10 + 10 + 9 + 8.10 + 7.29) to your contributor value. This has little effect on the majority of users, but prevents individuals from receiving a high contributor value from gifting a large number of promotional gifts, games obtained through pricing errors, or keys from contacting game developers.

    If a giveaway is invite only, region restricted, or limited to a whitelist or Steam group, it will only add contributor value if it receives 5 or more entries. This is in place to prevent small groups of friends from attempting to cheat the contributor system, and to encourage users to expand the reach of their giveaways. The whitelist feature offers an easy way to target a larger audience, and you can combine it with small Steam groups to receive a greater number of giveaway entries if needed.

If you hover over the "Gifts Sent" dollar value on your profile, you'll see your contributor value after all of the above adjustments have taken place. You might also notice that games valued over $50.00 will only require 50 points to enter. However, their full price will be used when calculating contributor values.

-What are levels, and how can I increase my level?

Levels range from 0-10, with level 0 being the default after registration, and level 10 being the highest level attainable. Levels represent a user's contributions to the community. At their core, they are calculated based on a user's contributor value. When a user creates a giveaway that's received by the winner, their contributor value and level increases. This allows the user to access additional giveaways that are restricted to higher levels. If you mouseover your level in the navigation bar, or the level on your user profile, you'll see a tooltip with the level rounded to 2 decimal places. This will give you a better idea of small increments in level, and when you're about to level up.

Levels increase in difficulty almost exponentially. Below is a summary of levels and their corresponding contributor values.
    Level 0: $0.00
    Level 1: $0.01 - $25
    Level 2: $25 - $50
    Level 3: $50 - $100
    Level 4: $100 - $250
    Level 5: $250 - $500
    Level 6: $500 - $1,000
    Level 7: $1,000 - $2,000
    Level 8: $2,000 - $3,000
    Level 9: $3,000 - $5,000
    Level 10: $5,000+

(人Θ'o)Enjoy♪