I use Glary and like it a lot. It is not snake oil. The net effect of employing some or all of its many options is to, U bet, speed up yr drive!
I use CCleaner every day, Glary perhaps 3X a week.
You can use both apps to configure yr start menu, scheduled tasks, the usual.
Few weeks ago here, a guy posted his built by HIM rig, and a lovely one... was increasingly slowwwwwwwwww, forget, his boot time was over 2 minutes
Most people offered responses with the premise there was something mechanical wrong with the drive (yes, a platter drive), suggested he should move up to an SSD.
I felt right off, issue simply was this drive was cluttered up with junk of all kinds, also needed defragging, etc. One of many utilities I linked him to was Glary. That is the one he got and ran every option within.....and bingo, his drive was renewed, his boot time down to something like 25 seconds.
Again, it was horses....not zebra.:sneaky:
So, I say, by all means, go there.