This is a very simple “trick” that might come in handy if you want to customize the title tag of you SharePoint 2010 site.
If you add any text to the title tag, it will simply be ignored, it doesn't show up in the browser, and you don’t get any error either.
My Portal: <asp:ContentPlaceHolder id="PlaceHolderPageTitle" runat="server"/>
You might spend a lot of precious time trying to figure out what’s wrong, and even if it’s possible to use your chosen title format.
It is possible, and this is how you do it, using an encoded literal:
<SharePoint:EncodedLiteral runat="server" text="My Portal: " EncodeMethod='HtmlEncode' />
<asp:ContentPlaceHolder id="PlaceHolderPageTitle" runat="server"/>