The first thing you need to read the Changelog. It will give you an overview of new features, improvements, bug fixes or any other changes in the new version. If you find these changes irrelevant or unimportant, you can skip the update.
The update process is similar to the theme installation process. You will need to replace the old theme using the FTP instructions, or delete the old theme from theAppearance > Themes screen, then follow the installation instructions to upload the latest version of the theme.
Please Note: If you have made any custom changes to the theme code, make a backup of your existing theme and save it to your computer before updating.
To update WordPress theme safely without losing your customization, it’s best to use a WordPress child theme. Should you have any difficulty in updating theme, feel free to raise your questions at our Support page.