PPC management agencies offer many different pricing models. Most agencies charge between 10-25% of your ad spend, and the industry standard rate is 15% of ad spend. Some offer fixed price packages, those package prices are usually based on an ad spend limit that works out to be about the same as industry rates.
It's generally a good idea to go with an agency that charges close to industry standard rates, if they are lower they will need to cut corners to stay within the fee budget which tends to affecting the quality of your service, and if they charge too high it eats the majority of your profits.
In my opinion, it is also better to go with an agency that offers variable rates rather than fixed, else they have a built-in incentive to limit the growth of your business to keep their own expenses within the fixed fee.
In the interest of full disclosure, I operate an advertising agency so I will recuse myself from recommending a specific agency.
Advertising your business is essential and is not something to take lightly. Not all people or even agencies have the same knowledge levels. It's all about results. It may be worth to spend 20% instead of 10% if the more expensive one produces much better results.
Using the AdWords Ad gallery
The Ad gallery, formerly known as the display ad builder, is an ad-creation tool that offers various display ad formats in different categories, such as image ads, dynamic ads, engagement ads and video ads, in any of your campaigns on the Google Display Network.
Here are some benefits of using the Ad gallery:
1.Differentiated products and services: Use images of your products, colors that match your brand, and your logo to encourage people who see your display ads to click on them
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2.More effective campaigns: Use display ads to drive higher click-through rates and overall conversion volume on the Google Display Network.
3.No-cost ad templates: Test various messages, color schemes and images, at no cost.
4.Customizable ad styles: Create a custom ad in as many sizes and variations as you like, and you'll only pay for ad clicks or impressions on sites across Google's Display Network.
5.Industry-standard ad templates: Create ads with a clear call-to-action button and 2 to 4 lines of prominently displayed text
Learn more about using the AdWords Ad gallery»