You would be able to systemize your trading in a way you would require less work in your part

Set and forget

Improve your profits by eliminating the human factor - We humans make error, algorithms don't

Speed on your executions - trading algorithms can be in an out of the market faster than you can double click

No feeling involved - A automated trading strategy will operate as indicated and never worry or have feelings

Be in the market at times you otherwise wont be able to - you can literally operate 24 hours a day, no need to rest for the algorithms