Yesterday Google’s new feature +1 button released on English search results on google.com a few months ago started to appear on Google search pages globally. The feature makes it easy for people to recommend to their friends content they like on Google search.

“We’ll be starting off with sites like google.co.uk, google.de, google.jp and google.fr, then expanding quickly to most other Google search sites soon after,” said Jon Krafcik, product manager for the Google Display Network on the Adsense blog.

Another good news for those who use for advertising is the AdWords expansion. Google announced a beta of interest categories on the Google Display Network over a year ago. Since then the ‘interest-based ad targeting’ has now expanded it to all of AdWords.

On its AdWords blog Google said that ads will feature the new industry standard Ad Choices logo and it will be easy for consumers to opt out.

The search system recognizes the types of pages a user visits, taking into account how recently and frequently those pages have been visited, and then associates their browser with relevant interest categories. Using these categories, advertisers can can target people most likely to purchase their products or services, and reach them across all types of sites in the Google Display Network in addition to contextually relevant sites.

The huge amount of over 1,000 interest categories fits any kind of business and helps reach over 500 million potential customers who visit the Display Network every day. Fees are charged only for clicks or impressions at auction prices, as it used to be.