When you use Google Adwords and cant be certain of what keyword matching option you must use, then you can enter all three variations you have in your keywords list. For instance:
Art Posters
Art Posters
[Art Posters]
After using them for some time you can check the clickthrough rates of the keywords and delete the ineffective keyword combinations.
Always use the negative keywords feature. For example if someone uses the search term free art posters then you should use the negative keyword free in the Google appropriate field and in result your keyword Art Poster will not be displayed.
By doing that you avoid the freebie seekers who are not targeted in your offer and as result you improve your clickthrough rates and reduce the cost of your campaigns. You can also use similar with the free term such as:
-no charge
-no cost
-costless
-chargeless
and so on.
The keywords number factor. The age of creating an ad group and load 4000 keywords instantly is over. Although there is not a specific rule for how many keywords you should use, follow Googles recommendations on the amount of keywords. Google...