"Active" coping pertains to the active steps that are taken to reduce the stressors’ negative impact on mental health.
Active coping is either by making needed changes in the environment when possible (see problem-focused coping), or adapting one’s inner or behavioral responses to the situation (see emotion-focused coping).
For example, a person is married and raising children. This can be a highly stressful phase of life. In order to manage their stress, one might go to counseling, enroll in yoga classes, meditate, take up a hobby, or anything that helps to decrease their level of stress.