The key INTENSITY features at a glance:

• Mastering-grade processing for more detail, clarity, density and loudness. 
• Proprietary INTENSITY circuit with SMOOTH, CRYSTAL and BRONZE algorithms. CRYSTAL & BRONZE feature near-zero latency (3 samples).
• Easy frequency dependent processing using our BIAS functionality and visual hover menus.
• Additional precision soft-knee saturating limiter at the output stage.
• Optional Mid, Side or L/R processing for stereo instances.
• Support for up to 16 channels for immersive workflows.
• Intuitive and fast workflow using a streamlined set of controls.
• Optional 64bit processing for the CRYSTAL & BRONZE algorithms.
• Fully vectorized GUI with zoom up to 200%.

So what IS this thing, then? You can think of INTENSITY like an infinite-band compressor operating in relative terms - whose time constants are zero, and which is controlled by a smart control system at audio rate - making it possible to adjust the process with essentially just one knob.

Well, except that this description would be completely inaccurate, as INTENSITY is absolutely NOT a compressor, and works in a completely different way. There's no RMS detector, no threshold, no ratio, no attack or release time. It doesn't pump or modulate in any other way. It doesn't overshoot and it works regardless of absolute levels and input type.

That said, the compressor analogy does serve to give you an idea of when to use it and what for.

INTENSITY is equally suited for processing individual tracks like speech, SFX, instruments - including guitars, bass and piano - as well as full mixes, multi-channel film stems, drum busses, and other complex content. This makes INTENSITY an indispensable tool for music producers, mastering engineers, sound designers, video producers, broad/podcasters, forensics professionals, audiophiles, or virtually anyone to quickly and easily add clarity, definition, and perceived loudness to their audio projects.

This plugin is probably the fastest way to get great sound. No kidding. The actual, real-world usage story goes pretty much exactly like this:

• Insert plugin
• Adjust INTENSITY amount
• Try which of the three algorithms you like best
• Enjoy the result.

In some cases, you may additionally:

• Adjust BIAS Amount and/or Curve
• Switch LEVEL COMPENSATION off
• Activate the saturation
• Try mid-only or side-only processing.

 ...that is literally it.

OK, we'll drop the geek.

It's a high-tech thing that makes everything sound way more awesome.
Which is why we call it The AWESOME!-Knob in our offices.
Put it on everything, all of the time. 
Be careful, it's highly addictive.
Plain enough? :-)