The ng:bind
attribute asks <angular/> to replace the text content of this
HTML element with the value of the given expression and kept it up to
date when the expression's value changes. Usually you just write
{{expression}} and let <angular/> compile it into
<span ng:bind="expression"></span>
at bootstrap time.
<ANY ng:bind="expression"> ... </ANY>
expression – {expression} –
to eval.
Try it here: enter text in text box and watch the greeting change.