Certifications and accreditations are essential indicators of an agency’s quality. These credentials must be bestowed by a reputable third-party to vouch for the work of a given agency. Some credentials even have different tiers to consider. Let’s say a company wants an agency that knows Google Ads inside and out. Their best bet would likely be to go with one that’s a member of the Top 200 Premier Google Partner program, an elite group of the best digital agencies that specialize in Google Ads.