Investment is a concept where resources are allocated with the motivation of earning profits. This could include buying a property at a lower price with the expectation to sell it at a higher price or investing in a business with the potential to make future returns. In finance, investing usually involves buying financial products. 

Unlike trading, investing usually involved longer time periods with the expectation of accruing wealth over a period of time. The success is usually measured by the return on investment or ROI. Since investments are usually for long-term,  investors are not so concerned with short-term price fluctuations.