Add Google+1 button to a page can help to promote a website. It is not only a bookmark and google is also a search engine, it is believed that more Google+1 of your page can help in SEO or raise page rank. To have promotion effect, you should set your Google plus profile to public. Hence, all other people can see your bookmark.
Add a page in Google+1
- Press the +1 button in the page. When the button change from white to blue, bookmark added.
- Add a +1 button in your browser.
Sometime, there is no +1 button provided in the page, we can add a button in our browser to add the page to our Google+1 anytime.
Google+1 in your web page
- Javascipt: http://www.google.com/webmasters/+1/button/
- iframe: http://wewillraakyou.com/2011/06/google-plusone-button-howto/
Google+1 in Google Chrome
Google +1 button is a Chrome extension help you to add the Google +1 on your browser. After installation, a Google+1 button will be located near the setting button of Chrome.
Google+1 in Firefox
Plus one button is a Firefox addon help you to add the Google +1 on your browser. After installation, a Google+1 button will be located near the reload button of Firefox.
Google+1 in Internet Explorer
There seems with lots of complain about the compatiable of google+1 button in IE, you may try extension for Internet Explorer provided by Pretty-Tools.com. As I am not a IE user, I did not try the extension yet!