If you hover you get this: **E and ed
There are two words for "and" in Italian: "e" and "ed". Replacing the more common "e" with "ed" is greatly dictated by personal preference. Rule of thumb: use it when the surrounding vowels are the same, for example "scimmie ed elefanti."**
Just be careful because it's "personal prefernce" and sometimes Duo prefers one and sometimes the other.