“Wellness” is the act of practicing healthy habits on a daily basis to attain better physical and mental health outcomes, so that instead of just surviving, you are thriving. 
 
“Health” is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity.” 
Wellness is thus Promotion of Health and Prevention of Illnesses.  It is quality or state of being in good health especially with an actively sought goal. 
Wellness is integration of physical, mental and spiritual well-being. It is a complex interaction that leads to better quality of life.