Discord - Free voice and text chat for gamers. As you can see from the link Discord is an app that it's designed to provide voice and text chat for free. Initially Discord was built for gamers, and have some features that are intended to make it comfortable for gamers to use the app.
See return on investment. return on investment (ROI) A generic term to define a number of analytical tools for measuring the financial benefits of an investment, including cash-on-cash, internal rate of return, equity dividend,and financial management rate of return.
ROI formula. One way to calculate ROI is to divide the net profit (return) by the amount that was invested: ROI (%) = Net profit / Investment x 100. Another way of calculating ROI is to take the gains of an investment, subtract the cost of the investment and divide the result by the cost of the investment. The ROI formula is: