Dynamic allows developers to use truly dynamic data structures in SourcePawn.
This means you can define a Methodmap and use Dynamic to back it's member data at run-time.
All dynamic members are typed which allows automatic type conversion between base types.
You can then extend and inherit Dynamic Methodmaps to build complex namespaces.
Namespaces simplify the sharing of complex structures which third party plugins can easily access with a minimal amount of code.