Segoe UI is a unique Windows source. If someone using Linux or Mac opens your site, the default system source will appear.
I recommend you use the Open Sans font, which resembles the Segoe UI font a little and is available on Google Fonts. Just link the CSS.
More information: https://www.google.com/fonts/specimen/Open+Sans
To use the standard Open Sans and Bold font, simply insert into the HTML code:
<link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700' rel='stylesheet' type='text/css'>
However, if you really want everyone to see the source Segoe UI independent of the operating system, just enter the source using @font-face
. View the CSS of the Microsoft website:
http://www.microsoft.com/surface/assets/css/fonts/all/fonts.css
But due to license issues, it seems that only Microsoft websites can incorporate the Segoe UI font.