Once your site is built, unfortunately, that is not where it stops. Like a car, a website needs some maintenance, and the more it is used the more maintenance it requires.
- Technology is constantly changing and evolving and websites usually have to as well.
- Spammers and hackers are constantly finding security holes and compromising them.
- Open source communities find errors and add new features to modules and plugins.
- Business requirements change and websites need to change with them.