Below is a list of well-known certifications. Most of them deal with proficiency in a well-known platform. A few are more general, but are still offered by a well-known platform vendor. All of them are free or nominal cost. There are some more-expensive, less-known certifications, but we’re not comfortable enough with their value to list them here. If we’re missing a popular certification, please contact us with info.
Google AdWords Certifications – by Google, free, last for 12 months.
Bing Ads Accreditation – by Bing Ads, free, last for 12 months.
Google Analytics IQ – by Google, free, last for 18 months.
Hootsuite Certification in Social Media Marketing – by Hootsuite, $199, certification does not expire.
HubSpot’s Inbound Certification – by HubSpot, free.
Optimizely Platform Certification – by Optimizely, $100, maintenance: must pass short online exams after major Optimizely releases.