As someone who works in this space I'm not going to give away all of my secrets (sorry), but I can advise you to ask the following questions and consider the answers carefully when deciding what to do:
What are you offering on any given page that is unique or better than what the next coupon site offers? Are you saying something insightful or helpful about Macy's on the Macy's page?
What does the link/text ratio look like on that page?
Is the coupon content 100% unique to you, or are you pulling that content in from a feed that also services other coupon sites? (Basically, do you have a large scale duplicate content issue across websites you don't control?)
Are coupons listed on a merchant's page with each also existing as an individual page for each coupon, potentially creating a thin and duplicate content situation on site?
If you want individual coupons to be indexed, should they remain indexed once they've expired?
Are you using a redirecting URL to mask/beautify/track the affiliate link? Do you want that link to be indexed even though it's not actually a page with content? (Sounds a bit crazy but we've run into issues with that in the past, just like how bit.ly links can get indexed sometimes, defying all logic.)
(eg. yoursite.com/couponclick/1234 --> super ugly affiliate link --> merchant page)
I'm going to be bluntly honest here, and not because I don't want the competition but just as a 5 year veteran in this niche and because you should know what you're getting into:
The coupon space is extremely difficult to break into. It is literally impossible emphasize this enough. The big players are very well established. Most of them aren't just offering coupons, but what I think of as "coupons+" (coupons + deals, coupons + cash back, coupons + charitable donation, etc.) and users respond to that and share it. RetailMeNot is deluged with high authority inbound links every time their stock moves a penny. Thin and duplicate content is endemic thanks to the ease of installing feeds, and making that content not just unique but also authoritative is easy to recommend but crazy difficult to implement at scale. Linkbuilding is next to impossible since no one really links to a Macy's coupon page, let alone a page for 2nd and 3rd tier stores without some kind of financial incentive, and Google gives no link credit for affiliate links (which should be nofollowed anyway). Users mostly aren't loyal to one site or another, they just want the coupon so they can get $5 off of some UGG boots. And when newcomers aren't able to cope or compete given all these difficulties, they often resort to blackhat tactics, making it even harder for those of us who keep things white hat to stay competitive (though Google has been much, much better about booting that crap since the Payday Loan update). Really, titles and metas, while it's important to get them right, are going to be the least of your challenges. Be thoughtful about the content, be user-friendly, find a way to stand out and you might have a shot.