A common banner hanger is to use grommets. Grommets are metal rings that are placed along the corners and edges of banners. In order to install grommets you will need a grommet machine. Grommet machines can cost a few hundred dollars and can be hard on your arms and back. Once the grommet is punched into the corners you use rope, zip ties, or bungies to hang the banner
Grommets are usually made of metal and look strong but, used by themselves, without reinforcement, they can easily tear out of banners in windy conditions. In order to prevent this, you must reinforce with a hem by doubled sided tape, sewing, or welding. All of which are time consuming, and the last two require expensive, sometimes finicky equipment. Sewing is the lowest cost alternative for only the highest volume manufacturers (several thousand banners per day) who can afford a maintenance person. For most others banner hanging applications, welding is the best option. Banner welders can be purchased in a range from under $2000 up to $30,000 or more. Want to know the difference? Throughput! At the low end, they are not much faster than manual. At the high end, they are.
At the end of the day, most people find that grommets require a significant investment of time and equipment to install. And the bad news is, they often still fail.