Just for clarification, the * character is used to repeat the preceding character zero or more times. It does not match the following character at all.
So when you tried *.Feedback your * wasn't matching anythingg at all, and your . was matching just one single character that could be anything but a line feed. Since there was a whole string of characters you wanted to match, and your . was only matching one of them, it was failing.
You'll notice the answer you received reversed the order, so the . matches any character and the * repeats that any character zero or more times, so you could have an infinitely long string of characters before the word eedbac is found (any characters except a line feed).
Note that yoru regular expression matches everything, so it will pass a valid match on: