Using the Treynor ratio is essentially measuring the returns of your investment minus what you may have earned in an environment where there was minimal to no risk. This is important because you can measure how much of a premium your equity may be trading at or a discount. Not only that, but you can being to measure the amount of risk you are taking for the return on investment you are getting.
If you have yet to understand risk, begin looking at other risk measurements such as risk adjusted performance and understand what the risk free rate of return is. Ratios us as this are meant to help you mitigate risk and continue to bring in underprice equities. The goal of any portfolio is to increase risk while keeping a stable risk level.
Risk is one of the most important aspects of investing and finance and should be monitored with care. Using this ratio can also help you compared equities apples to apples, letting you understand which investments may be offering better value than others. When implementing this you should doodle on the side until you fully understand how to use this ratio. After that, feel free to implement this as you wish and begin exploring the world of risk. If you get stuck, reach out to an investing professional and they can help to point you in the right direction.