GADGET
Using the phone all day can slow it down a bit due to the hanging process. Google also recommends restarting the phone.
Delete apps that are not in use or they may consume RAM and processing power in the future.
Go to the phone section on your mobile and tap a few times on the build number, a toast notification will appear that the feature is enabled.
If you're not sure which apps or files are taking up space, check out Google's Files app to see which files you can delete.
Not only does this increase device security, but it also often fixes bugs that slow down your device.