Not everyone has updated their website to integrate with Google+. This Chrome extension makes it possible to +1 any webpage which means you’re sharing it with your friends and contacts. The Google +1 button sits to the right of the address bar being very easy to share anything of interest.
Check it out: https://chrome.google.com/webstore/detail/kmonhedbcpagbphilnoajiencllnpoii?hl=en-US&hc=search&hcp=main