There are innumerable reasons you may require a custom banner or sign, when you will, and you never know. Here are four events for which you might:
A Grand-Opening: Promote it nicely, and you would like to promote it, in case you're opening a retailer or shop of any kind. The primary couple of months for any company are critical, along with a grand opening that is good can generate just the momentum you should get through them.
Going Out of Business Sale: You have to advertise just as much in case you are having a going out-of-business sale. This is your last opportunity to earn a profit on your own investment, so bust-out banners and the flags and window graphics to let people find out about your going out-of-business sale. Again, market wherever you can -- you want as many customers as you possibly can as of this sale that is final.
Special In Store Promotions: According to the kind of company you run, try and get a celeb -- nearby or otherwise -- to do a meet and greet or signing of some sort. Say you own a bookstore -- get out a writer with a book that is new to do a reading. Or, if you operate a sports goods shop, consider getting a well-known sportsman in the area to sign autographs for an afternoon.
Any Ongoing Promotions: You might have occasions or special prices once weekly, once a month, perhaps even once annually. Regardless, if there's any kind of repeat to an occasion or sale, possess a custom banner or sign made up, some thing like, "Huge Blow-out Sale, This Thursday!" (assuming you constantly have it on a Thursday). Or, you could have a signal so you can record on date and the day made up having a blank area.
Regardless of the occasion, make sure to apply the Internet in addition to any bodily signage you utilize. Twitter, use Fb, MySpace, a Linked In, everything and whatever you can. Set up an Yelp accounts so people can later write reviews of whatever you're planning, and ensure you're on FourSquare so individuals can "sign in" when they see your shop. Banners and signs are excellent for getting out the first word there, but you require follow-up info that folks can save on their computers or phones.