A new report from Pyramid Research says location-based advertising is becoming increasingly popular.

In 2008, the location-based advertising market was worth just $86 million worldwide, representing 10% of all mobile advertising. Last year, it had increased to $588 million - 18.5% of all mobile advertising - and by 2015 it's expected to reach $6.2 billion (£3.8 billion).

Map and location data provider NAVTEQ has published a survey about consumer reactions to mobile advertising within navigation.

Overall, 67% of consumers said they they were happy receiving promotional offers in exchange for free use of their favourite location-related content. Real-time traffic news was seen as the most valuable content for consumers, with 72% of respondents saying they'd use it on a weekly basis.

Worldwide mobile advertising revenue is forecast to reach $3.3 billion this year, according to new research from Gartner. That's more than double the $1.6 billion generated in 2010.

Mobile ad revenue is expected to keep growing, reaching $20.6 billion by 2015, with search and maps expected to deliver the highest revenue.

New research from comScore shows that the number of advertisers using mobile display ad campaigns has more than doubled in the past two years.

The figures, which come from research conducted in the USA, also show that mobile content and publishing accounted for half of all products advertised on mobile devices.

Millward Brown Optimor, part of the WPP group, has just published the 2011 edition of its BrandZ report. It's the sixth annual edition of the report, which details the world's "Top 100 Most Valuable Global Brands".

It notes that the world’s best brands appear to have recovered from the recession at a faster rate than their competitors. The combined value of the Top 100 brands this year is calculated at $2.4 trillion, more than Great Britain's GDP.