PHP environment
Multiple PHP versions make shop migration, module compatibility testing and gradual upgrades easier.
PHP-FPM and OPcache improve PHP application handling under higher traffic.
Cache and database
PrestaShop uses the database heavily, so cache settings, MariaDB/MySQL and load control matter.
Redis or Memcached can support selected application parts depending on shop configuration.
Migration and maintenance
A shop move requires checking files, database, DNS, SSL, e-mail and scheduled tasks.
Backups and malware scanners reduce the impact of update errors or infections.