You should always have a backup.
Your shop could be damaged by everything – malware infection, crazy developers, hosting problems etc. But if you have an up-to-date backup, then you are safe.
Using Sphinx search in PrestaShop
PrestaShop have a nice search tool, but sometimes it doesn’t fit all your needs. Also it is not really fast and on large shops search and indexation could be very slow.
If you want something better, you can use a great replacement – Sphinx.
How to configure PrestaShop module
How to access module settings page? Just open Back Office and choose “Modules” in the main menu.
It may look a bit different in different PrestaShop versions.
For example, in PrestaShop 1.6 it looks this way: