Socialsharewidget Open Graph Tags

Hi Developers

Recently I have used an extension for sharing my page in social networking website.I used this widget ‘ext.Yii-social-sharing-widget-master.SocialShareWidget’ Sharing is working fine.My problem is I have shared my page in facebook , while sharing it randomly loads a thumbnail image.I have to change the image by setting my own defined image.I have checked in google , by using the open graph meta tags we can change the image.

May I know how can I add a meta tags and meta titles to my yii pages.

In html here is the code.

<meta property="og:image" content="My Image path" />

<meta property="og:title" content="My website description"/>

Can anybody tell me how can I add these tags to my yii view pages.