Final answer:
Extracorporeal shockwave therapy (ESWT) is the advanced technique that must be applied directly on the sites of plantar fasciitis lesions.
Step-by-step explanation:
The advanced technique that must be applied directly on the sites of plantar fasciitis lesions is called extracorporeal shockwave therapy (ESWT). ESWT involves using high-intensity sound waves to stimulate healing and reduce pain in the affected area. It is a non-invasive procedure that can be performed in a clinical setting by a healthcare professional.