Snippet:
Directive How Source Rendered
ng-bind-html Automatically uses $sanitize 
<div ng-bind-html="snippet">
</div>

an html click here snippet
ng-bind-html Bypass $sanitize by explicitly trusting the dangerous value 
<div ng-bind-html="deliberatelyTrustDangerousSnippet()">
</div>

an html click here snippet
ng-bind Automatically escapes 
<div ng-bind="snippet">
</div>
<p style="color:blue">an html <em onmouseover="this.textContent='PWN3D!'">click here</em> snippet</p>