is one of the possibilities to update from the normal Manjaro repos. You could also use
pamac upgrade
When you intend to upgrade your AUR packages as well, use
pamac update --aur --devel
When using a rolling release distro like Manjaro or Arch you should keep your system updated. Whenever you install a new package, make sure your packages are up-to-date and on top of that at least once every two months.
No, in #announcements you could sometimes find extra tips to be done before or after updating. In rare cases there could be recommendations for specific systems to wait with the update.
Woops, I saw that the terminal was ready for the next command and I closed it (I didn’t get any warnings from the system while I was doing this). I rebooted and started getting apps.