Wildcard characters are special characters that are interpreted when comparing text.

There are three meaningful wildcard characters:

? - matches a single character
* - matches everything (including nothing)
& - matches a whole word if used alone

For example the expression t*s a *?t matches the string this is a text

If & is not used alone it matches the plain text '&' character

test & matches test this or test that

test &his matches only test &his

test thi& matches only test thi&

test th&s matches only test th&s