Increase SQL server database size

Hi Team

We need to increase the SQL server database size. Seems the process is simple but I just want to make sure I am following the correct procedure.

Can I do this on live server?

Do I need to follow any other prerequisite except taking the backup of database?

https://docs.microsoft.com/en-us/sql/relational-databases/databases/increase-the-size-of-a-database?...

Thanks

Sazzad