Firmware is the operating system of your router. Just like your smartphone needs iOS or Android updates, your router needs updates to function correctly. Here is why you should update:
If the automatic update says you are up to date, but you know a newer version exists (perhaps released by your ISP recently), you can update manually. This method is riskier and requires technical confidence. Hg658 V2 Home Gateway Firmware Update
A failed firmware update can brick your router (turn it into a useless paperweight). Follow this checklist to the letter. Firmware is the operating system of your router
Open a browser, type 192.168.1.1, and press Enter. Enter your credentials. If the automatic update says you are up