Should the content and the title of an add variation have many keywords? For example i am creating a campaign for a car rental company, with title: Title: Car rental in Greece Should the description be like: Description: We offer professional and quality services. Visit us for info. OR Description: We offer car rental services. Visit us for car rental. ??
How about: Professional, quality car rentals Make your reservation today! Don't forget to use a call to action for the consumer. Also, use the ad variation rotation if you are not sure, make up a few different ads and then drop the ones that are not performing and create more until you find the one that works best.
To get quality traffic you should highlight your USP or benefits to users or offers (if any) in your ad description which actually help to entice users to click on your ad then others' ad. Like Best Price Guarantee, Car Rentals from Rs./Day etc. Also use some call to action as suggested above.
I doubt you will get quality traffic/conversions with the content network. You can try it, but I would recommend setting up a new campaign to try same. From my experience, the content network usually offers miserably low conversion rates for most products and services. It can work quite well for building an email list.
you want to get the keywords in your description, but you still want the description to have meaning so you can qualify your visitor Try to include the following 1. have a call to action 2. explain why your site or offer is better than the rest