What does 都 mean in 小松鼠每天都到地里去 The full sentence is 


  小松鼠每天都到地里去，看看结花生了没有。


What is the function of 都 in this sentence? Is it to emphasize that the squirrel looked every day, or that it looked everywhere, or is it something else completely?
Chinese grammar wiki has a page for the "每 + measure word + noun + 都" structure to express "every".

Sometimes when the noun is also a measure word (like your example, 每天都), the "measure word" part does not show up in the structure.

And it is to emphasize the "every".