Enable redis in the hosting control panel
Install Redis Object Cache ( Till kruss )
Config wp-config.php
define( 'WP_REDIS_HOST', '127.0.0.1' );
define( 'WP_REDIS_PORT', ENTER_PORT_HERE );
define( 'WP_REDIS_PASSWORD', 'ENTER_PASSWORD_HERE' );
define( 'WP_REDIS_DATABASE', 0 ); // 0-15
enable the plugin -> wp-admin/options-general.php?page=redis-cache