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It gives you an indication of your version number, and the number for the latest version available on the PrestaShop servers. If there's a difference, you can click the "Upgrade PrestaShop Now!" button in order to start the upgrade process. A status upgrade then appears at the right, while the process is running.

Wiki MarkupThe area below the "Update" section will then scroll with a list of the various changes brought to your PrestaShop install: removed files (normally, the ones for the default theme), location of the backup archive (normally in the {{/\[admin\]/autoupgrade}} folder), files added to said archive, files copied from the new version (and therefore marked as upgraded). A lot of files are thus mentioned, and you do not need to read it all!

You'll know the upgrade is over when the message "upgrade complete. Please check your front-office (try to make an order, check theme)" appears in green, along with the following status update: "Upgrade process done. Congratulations! You can now reactive your shop."

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