stage 2 foods question!

What made you start stage 2 foods versus continuing with stage 1 foods? I started my little guy on stage 1 foods approximately 2 weeks ago and am not in a rush to start stage 2, I just didn't know if there was anything people looked for to see if baby is ready for next stage foods. :) he is still breastfed and only receives stage 1 foods twice a day in small portions :)