Compaign manage can set ads for products, when comes to key words, there is a “Automatic keyword”, and one set by yourself, which one is better?
I find automatic keywords is great to get started especially for new products. It is a fantastic starting point in some cases, it will give you ideas for keywords.
You can start with an automated campaign and then check the reports after a week or two:
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Be on the look out for effective keywords that generate clicks that convert into sales, retain those and discard every broad keyword that are not specific enough.
Add to these, a list of keywords that you think your buyer may be looking for, as the seller you have an insight into your products that the system will lack.
A combination of these two will get you the best results.
Create a new manual campaign then with your compiled list (You cannot convert an automatic targeting campaign to a manual one, you need to create a brand new campaign.)
The thing to bear in mind is that you need to monitor your campaign regularly and also hone your keywords until you get the best results.
Better to use By yourself Keywords