SSD (Solid State Drive) are very fast in speed, its read/write speed is much better than an ordinary hard drive and do not have any rotating part like in Hard drive. SSD operations are reliable, Efficient and thus enhanced server performance. There is a less chance of failure in SSD as data stored in a chip.
SSD drives are costly as compared to the HDD drive or any other drives because
The VPS servers with SSD drives are known as SSD VPS. Imagine 20 people are using a HDD and 20 are using SSD. It should be really slow on the HDD as the speed is only good for single person while on SSD you will feel a major difference. SSD VPS Hosting service provider mostly suggest there customer to shift on SSD VPS to get better performance.