Good questions. Filler words are words used for filling silent moments of thoughts or uncertainty.
All languages have them and they go way beyond a simple “ehm”.
Tipo / Come Like
Beh Well
Cioè I mean
Vedi / Sai You know
Allora Then
E And
Quindi So
Per esempio For example
Diciamo Let's say
Keep them in mind because they are very important to improve your fluency when your vocabulary is limited and even when you will be an expert.
Connectors are patterns used per start o connect sentences in a conversation. They also work as filler words in many cases.
Penso che I think that
Cos’altro? What else?
Come si dice? How do you say that?
Direi I would say
A: Cosa pensi del film di ieri?What do you think about yesterday's movie?
B: Beh, penso che sia un po' brutto.Well, I think that it is quite bad.
A: Quindi non ti è piaciuto?So you didn't like it?
B: Cioè, sai io non sono un esperto ma diciamo che ci sono molte cose che non mi piacciono. I mean, you know I'm not an expert but let's say that there are things I didn't like of it.