Yoga means to link with the supreme person. There are many types of yoga systems, but the top most yoga system is Bhakti Yoga, devotional service unto Lord Krishna (God).
The other types of yoga systems like Hatha Yoga involve bodily postures and breathing exercises. Hatha Yoga is for the body and Bhakti Yoga is for the soul. We need to maintain our body and soul and thus both are beneficial for us. But, Bhakti Yoga is very important as our current body is only for this short life but the soul is eternal.
“Yoga is linking oneself with the Supreme. One can never become a yogi unless the desires for sense gratification are given up.”(Lord Krishna, Bhagavad-Gita 6.2)
One must give up materialistic desires like going to see cement/stones/wood (places), give up accumulating material possessions like money, cars, properties, phones etc., give up lust for eating flesh (meat) and seeing flesh (attachment for men/women), and give up personal ego. Such persons are called yogis.
“Of all types of yogis, one who always thinks of Me, worships Me, and renders loving service unto Me with full faith is the greatest yogi.(Lord Krishna, Bhagavad-Gita 6.47)
Those who have given up material desires and always serve Lord Krishna with their time, money, and effort are called Bhakta Yogis, the best yogis.