Notification icon that looks like 4 patches stitch together (shaped like Windows icon) What is the circled icon that looks like 4 patches stitch together (shaped like Windows icon) circled in blue is for?
It is pretty easy to figure out app icon on notification panel , downloaded from Google Play Store


App notification icons usually are on the left half of notification panel
Google Play &rarr; My Apps and Games &rarr; Installed  brings up all apps on your phone. Just scroll through and match with icon on notification panel
Google Play &rarr; My Apps and Games &rarr; All  brings up all apps you downloaded , including on your earlier devices. This icon was familiar since I had used it on my earlier device and matching icons tells me it is AVG Antivirus. Thanks to Mathew and Vivek confirming same in comments