"If you wish to understand the universe, think of energy, frequency and vibration". Nikola Tesla. It is well said that human life without energy, frequency and vibrations cannot be imagined. Everything in universe is energy and science has proven this statement to be true. Due to exponential growth of industrial internet of the things (IIOT) and IOT, industrial/consumer products become smart and intelligent due to deployment of sensors and actuators. The energy harvesting (EH) makes it power autonomous and maintenance free. It is the need of an hour to trap ambient vibration energy and convert it into electrical form. This book covers overview of the piezoelectric material , synthesis of Piezoelectric materials, and material deposition. Micro and nano scale implementation are also discussed . Electrodes schemes ,Structural and electrical characterizations, power conditioning unit (PMU), Commercial Status and future scope are the key areas of book contents.