Today, Google Come-up with Google Tag manager software.
The Main advantage of this tool is
- Manage Google Analytics tracking code, Custom HTML Tag, Custom Image Tag, Double Click Floodlight Counter & Sales, Adwords Conversion tracking, Adwords remarketing tag from single container (from centralized location)
- Modifying & publishing tracking code / snippets made easy. Save lot of code integration time
- Manage Multiple domain snippets from centralized location.