Customizing WordPress: You Might Be Performing It Wrong Link. If you attempt to make modifications to a website, an astonishing number of individuals opt to modify their theme directly. What this means is they are altering or adding files in their existing theme’s folder. This results in a number of problems. The biggest disadvantage is that virtually any modifications made to the theme applying this method will be lost once the theme is brought up to date by the developer. , users either won’t have the capacity to keep their theme up to date (which is hazardous to security) or will find every bit of their customizations gone.

Howto Create A WordPress Child Theme