In the Automation if you're using the OR logic you can't check the same field for multiple options which means a new automation needs to be created for each check.
For example
We want to change the default priority on certain types on raised calls and do this with a simple automation that checks the keyword and then updates the priority.
However because we can't add multiple Keyword queries we have to create a new automation for each keyword query.
So rather than having the logic of
keyword = item 1
OR
keyword = item 2
OR
keyword = item3
The OR logic is limited to checking 1 field OR another field but not the same field multiple times.