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Like what is written in the picture, this notification feature can help you get new updates from every board or thread (if you enable this feature for your board you will get updates if there is a new thread and if you enable this feature in aa then you will be given know if any new people comment on the thread), then after you activate or use this feature you will get a notification to email address you used to register in BitcoinTalk.

If you want to get a new update about a bounty, then use notify feature on section board that I give the green mark on the picture.

Thousands of Muslims are already trading bitcoins in my home town. It's "halal" because it's just like normal physical trading where you buy low and sell high. Am a Muslim and am fully engaged in cryptocurrency

Chances are as a newbie you can not participate in signature bounty campaigns. This is because there is no space for signature link since you have not been upgraded. In most cases for you to be accepted, you must be a Jr member. You to be active and must have done up to 30 activities to be ranked so. As a newbie your best bet is to participate in other bounties like facebook and twitter campaigns.