Although demographics on their own cannot define a segment because they do not define the proposition a segment requires, they have an important role to play in a segmentation project. This background information about customers can be used to identify the particular profiling characteristics associated with the customers found in each segment. In other words, demographics helps identify who is found in each segment which, in turn, will help you determine how to reach them.
Geography
Rather like demographics, segments based on geographic areas, however tightly defined, assume that everyone in a predetermined area can be expected to react to a particular offer in exactly the same way. Even at the postcode level this does not appear to work; simply if we look along our own street. Has everyone got the same furniture, do they buy from the same shops, eat the same food? Once again, however, although geographic areas on their own cannot define the propositions required by segments and, therefore, cannot define segments, they, too, have a useful role to play in a segmentation project. This particular type of background information about customers can be used to identify the most likely locations the customers in each of the segments may be found and, therefore, further help you determine how to reach them. A further consideration with respect to "geography" is its use in international market segmentation.
Channel
Routes to market are becoming more sophisticated and complex, and are also becoming an increasingly important component of many winning customer propositions. Channels in themselves, however, do not define segments as they are simply the means by which customers and companies connect with each other. It is only when you understand the motives behind the channel choices made by customers that the channel component of a needs-based proposition can be developed. However, even if channel does not feature as a key component of a winning proposition, it is, along with demographics and geography, background information about customers that should be tracked during a segmentation project. It could well be that some segments can be associated with particular routes to market; therefore it is the channel(s) they use that provides the means for reaching them with their specific proposition.
Psychographics
Here we have another customer insight that can contribute to a segmentation project but, on its own, cannot define the entirety of a winning customer proposition. However, by identifying internal drivers of customer behavior that can be associated with specific segments, psychographics can help define the most appropriate promotional stance to take. This not only provides the means of catching the attention of target groups in an ever cluttered world of communication, it can also provide the means by which you isolate and reach particular segments.