As defined by The Association for Size Diversity and Health, Health at Every Size  is “a movement working to promote size-acceptance, to end weight discrimination, and to lessen the cultural obsession with weight loss and thinness. The HAES approach promotes balanced eating, life-enhancing physical activity, and respect for the diversity of body shapes and sizes.” Please see the ASDAH’s website for more information on HAES.
In my practice, I do not pathologize clients’ body weight, shape, or size, which means being able to work on clients’ personalized health goals beyond blanket advice to just “diet and exercise and hopefully lose weight”. It also means supporting clients in eating disorder recovery to fully nourish themselves, not stopping short or imposing diets due to arbitrary BMI cut-offs or fat phobia.