Click here for a HowToGeek article named "10 Great iPhone Home Screen Widgets to Get You Started"
Click here for a HowToGeek article from Sept 2020 goes over the use of widgets in "Today's View"
Click here to read a CNET article from June 2020 following announcements from WWDC 2020 regarding the use of Widgets
Click here to read an article from Sept 2020 called "Sticky Widgets brings Sticky Notes to Your iPhone or iPad Home Screen for Free" produced by Review Geek.
Click here for the App Store preview.
Click here for the Apple Support Page.