In case you don't know, the 'Places Bar' is that left-side menu that appears on every Windows File Explorer window and that includes shortcuts to the most frequently used folders.
The problem is that you may not agree with what Windows considers to be a frequently used folder. If so, simply load Findexer on your system and you'll be able to customize this menu with shortcuts to your actual favorite folders.
Using the program is a bit tricky, as it doesn't have a proper graphical interface. You need to run the register.bat in order to load it on your system and then restart Windows File Explorer. Open any folder, click on View > Explorer Bar > Findexer and you'll be ready to use it. You can customize Findexer in many aspects, from the menu's appearance to the number of links displayed, including number of shortcuts, the order they appear and the icon and text font. Plus, adding new shortcuts is as easy as dragging and dropping them onto the Places Bar.
Though the idea behind Findexer is very good, there's one big drawback to the program: apparently you need to activate it (that is, go to View > Explorer bar > Findexer) every time you open a new window, even if you already activated it before on that same window.
Findexer lets you customize the Places Bar on Windows File Explorer, though unfortunately you have to manually enable it on every single window.