Get Your Keywords Right for Paid Search - Develop a robust list of keywords. Re-examine this list at least quarterly to ensure you optimize the most popular terms shoppers are using. Online shoppers now use four- and five-word keyword strings to more quickly find what they’re looking for. A shopper who used to search for “red sweater” now is more likely to search on “men’s red wool pullover sweater” to focus the search and yield better results.