Today, most dynamic websites use something called PHP which stands for hypertext processor. The language is used in conjunction with the web server to pull specific elements from a database to create web page on the fly that is then displayed to the user in a web browser. Many open source systems like Drupal, Joomla and WordPress use PHP as their core language.
Some clients of Digital Firefly Marketing use PHP to deliver custom functionality on their websites that aren't provided by the open source community. Other companies wish to mimic functionality such as social media link placement on pages or using information from certain APIs. It really depends on the clients needs. We never ask them to slow down because of limits but simply ask them to tell us what they want so we can deliver it.