When is disk defragmenter pro required?

My laptop wasn’t performing very well for the past weeks.
It has been frequently hanging and took ages to open some applications. I performed a disk analysis to check the percentage of fragmentation, and according to it, a defragmentation was needed.
I had proceeded with the defragmentation.
After the process, the speed and performance of my device haven’t improved.
I performed another disk analysis and learned that the percentage of fragmentation hasn’t changed, meaning that the defragmenter was not working well.
Does my device require a disk defragmenter pro to assure optimum results?
