How to play my free chip at Ruby slots?

First, you are going to have to check your email, the one you used to register on Ruby Slots.

Then, once you get the confirmation email for your purchase, there will be a bonus code attached to it, and that is the promo code you will use when you log in to your Ruby Slots account.

If by your question you are asking how to redeem the chips after redeeming, look at your main bonus coupon redemption page. If there's no prompt to play then try to load any game through the lobby and see if the site will redirect you to your spins. If that doesn't get you there, try looking at the details on your coupon and look for the specific game you bought with your coin. 

If you are looking for advice as to how to play the coin after redemption, you must first play all the free spins associated with the redeemed coupon before you decide which games will keep you playing for at least a while. I might suggest Fortune Buddha or Cash Bandits 2 or 3 they usually play awhile and pay well. If not there's always keno. Hope this helps and good luck!

After you purchase you should be able to Play. Right away if not you might have to redeem them if that's not any of them then I recommend contacting customer support