Do not go overboard though.

1. You can cite testimonials.
You can use those positive testimonials that your previous clients have told you or written you about. This will be more effective if a known person will testify as to how effective your product is or how good the people are in your company.

Do not go overboard though. Do not invent the words for the sake of the ad. You still have to be true and sincere.

2. You can use endorsements.
This will require an additional cost. But if you’ve got the right person to commend your products to your target market, then by all means, do so. You can get a celebrity, a known individual and an expert in your field.

3. Be proud of your awards.
Not all companies may have these. So if you have a lot, especially from credible award giving bodies that have something to do with the industry, then use such tool. This will play an important role in convincing your clients.
4. Business background
Are you affiliated with any larger companies? Or maybe you have been in the business for so many years already. Or you may also be part of a group of renowned businesses. You can boast all those to the people who will be getting your ads.