connection type

Dear Snatchbot community,

I have been testing Snatchbot and really enjoy the experience. My main objective is to learn enough about the technology to be able to share with our Academics and teaching staff in the College of Arts and Social Sciences, so that they could in turn use bots to teach and/or improve teaching and learning experience.

Would someone be able to help me clarify a few things? So when I add a connection I can choose between:

Response to this interaction (so far I have been using this option)
or
Extracted data from this interaction
or
Custom variable

Could someone please give me examples of how these options work? would you have screenshots of your work?

Also, has anyone tried the other options:

contains (whole word)
contains (any part)
contains all of

I am a bit confused... which one is the best option - I know that if they are all offered as an option, it means that depending on what we try to achieve we would choose one specifically, but I can't figure out when to use which. Would greatly appreciate if someone could give me examples.

Thanks a lot for your time,

Have a great day!

Joelle