Hi Nikhil,

there are multiple forces which act on your body on your day to day routine. The first and the most common is the gravitaional force which attracts any body towards the earth which is approximated as 9.8 m/s^2. Whereas you can move because of Newton's thrid law, which states each force has equal and opposite reaction . As you put your force on ground the ground forces to back and hence you tend to move forward. 

Hope this answers your query,

Cheers!