Pictured is a supercharger (above) and an SSD next to a mechanical hard drive (below). Superchargers add massive performance to any vehicle, but mostly at lower speeds and RPM ranges. The same is true of loading your O.S. (operating system) onto an SSD. Of all the things you can do to make your computer faster, using an SSD will have the biggest positive impact on the daily performance of your computer. For instance, if you have 4GB of memory ('RAM') in your computer and you double it (making for 8GB of memory), the daily performance of your computer will probably improve by 10% - 20%. By comparison, using an SSD drive will probably improve the daily performance of your computer by 50%.- 80%. The only things that may not improve drastically when using an SSD are things like CAD (computer aided design), video editing, and gaming. CAD, video editing, and gaming are not typical daily uses of computers. Daily use typically entails booting up, visiting Websites, email, and loading files (e.g., photos or resumes) from the hard drive into memory. That's not to say that heavy-duty tasks won't improve with an SSD, just that they may not improve as drastically as typical tasks.
The process of moving from a mechanical hard drive to an SSD is not a cakewalk, so part of what I am suggesting here is that when you buy your next computer, consider the models that come with an SSD. If you want to move to an SSD there are two main choices, and a full backup of your data is a necessity before either: (a) reinstall Windows and programs from scratch or (b) attempt to 'clone' your existing mechanical hard drive to an SSD.