Well although I would say that as much as what keywords are best to use when placing ads can be rather subjective depending on overall how it is being used for example :
Scam can be a double edged sword likewise is also FREE:
Eg when we use Scam we can say why it is not a Scam and share your findings even though by itself it can be a rather negative word and lead readers to misunderstand it but when projected in a positive light it can be a powerful keyword.
Free can also be deemed as something skeptical as we all know there is no free lunches and tend to be overused even though it can be a very powerful word when used in the RIGHT CONTEXT, CITED Examples and proper perspectives .
Therefore be careful how you go about using your keywords and do put in more research and thought on the pros and cons before giving it a shot and draft remember to track your ads key works and tweak accordingly to see which keywords works best for which specific Areas ,Ads and platforms
Well although I would say that as much as what keywords are best to use when placing ads can be rather subjective depending on overall how it is being used for example :
Scam can be a double edged sword likewise is also FREE:
Eg when we use Scam we can say why it is not a Scam and share your findings even though by itself it can be a rather negative word and lead readers to misunderstand it but when projected in a positive light it can be a powerful keyword.