走 means walk，去 means go，去 has to know go somewhere，but 走 has not to， for example，1. 去公园吧 is correct，走公园吧，is incorrect，2. 我们去公园吧，好，走吧/ 好，去吧，both correct 3. 太晚了，我们走吧 is correct，太晚了，我们去吧，is incorrect

1、走representive action,去means destination and direction.For example,走路（walk） 去书店（go to bookshop）. 2、The world 去 is wide used than 走 when you want to say go somewhere.

In general, "去" means "go" and "走" means "walk", but "走“ can mean "go" in the sense of "depart".

我们去公园吧，好。走吧，means ok，lets move now，好，我们去吧，means ok，we will go there，好，走吧， is equal to 好，去吧，现在走。

They're totally different. 走 means "walk" or "on foot' (孩子还不会走呢! ) 去 means "go to somewhere". (我不想去学校)