Final answer:
If a paid keyword has an Assisted/Last Click or Direct Conversion value of .5, the keyword assisted less frequently than it completed the final interaction in conversions and does not indicate the exact number of conversions.
Step-by-step explanation:
When a paid keyword has an Assisted/Last Click or Direct Conversion value of .5, this indicates that the keyword played an assist role half as often as it played a last click or direct conversion role. It does not specify the exact number of conversions. Therefore, the correct answer is (c) the keyword played an assist role less often than it played a last click role. An assisted conversion is one where the keyword contributed to a conversion, but was not the final interaction before a conversion occurred. A keyword with an assisted/last click value less than 1 means it served more as the final interaction rather than as an assisting role in the path to a conversion.