Signals are the atomic units in Audience Manager and are expressed as
key-value pairs.The key is a constant that defines a data set (e.g.,
gender, color, price).The value is a variable related to the constant
(e.g., male/female, green, 100).Comparison operators join the key-value
pair and set the relationship between them.A few examples of signals are
-product=cycleprice>500type=mountainDo's for signal keys -Starts with a
letterStarts with a quotation mark.Starts with an underscore (_)The
follow...