There are many great services across the industry to help you build and enter contests. Using an optimizer has many benefits. They allow you to input your own projections, find value you overlooked, and mass build hundreds of lineups in minutes. Many optimizers allow you to tinker with many settings. For example, if you want to build a safer cash lineup you can set the program to run safer plays with less upside. On the flip side, you can also use it to run GPP lineups which carry greater risk, but higher upside. Being able to run a program that matches your playing personality is a great advantage to take into your DFS contests.