With minimal syntax I mean a language that could be entirely described with the least words possible, but complete enough to make any kind of program.
closed as not a real question by Robert Harvey, ChrisF♦ May 18 '12 at 19:42
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, see the FAQ.
If you want to reduce it as far as possible, it's actually possible to create a Turing-complete language with only one operation in the instruction set.
Tcl only has 12 rules that govern the whole language, and they fit pretty comfortably on one man page.
I'm not sure how to answer the question about how it is important, other than to say it makes for an (arguably) easy to understand language (though it does require you to forget assumptions you have about how you think a language should work).