The phrase "to complete the certification" means to finish all the necessary requirements or tasks in order to obtain a certificate that confirms your skills or knowledge in a particular field. Full definition
Classes are offered throughout the year, enabling participants to complete their certification in as little as two years. (indiana-asbo.org)
Simply be proactive and do your research, and consider completing a certification program. (animalbehaviorcollege.com)
Once a person successfully completes the certification process, we will offer them assistance in setting up a class in their community. (veganfusion.com)