Nd YAG laser has following applications or uses or advantages:

• They produce continuous laser at room temperature
• They can be used as portable systems since the rods are small.
• they have surgical applications.
• they are used material processing such as drilling, spot welding and marking.
• They are used as pumping tunable visible light lasers.
• They have applications in military such as including range finders and target designators.
• Research applications such as Raman spectroscopy, remote sensing, mass spectrometry.

Reference: This article is referred from my authored book “optics and lasers” having ISBN 978-81-272-3833-9. In case of any doubt, post in the comment section.