Ad blocking became almost as popular on mobile devices as on desktops and laptops at the end of last year, just months after Apple introduced the ability to block ads on iPhones and iPads. Data from the last three months of 2015 from GlobalWebIndex recorded a rise in those reporting they had used an ad blocker on mobile devices within the last month, compared to 38% on computers, which was also up by 10 percentage points on previous quarters.

Children in the UK are spending more time on the internet than in front of the TV for the first time. Research firm Childwise found that on average five- to-15-year-olds were spending three hours a day using the internet, compared to 2.1 hours watching TV. The amount of time children spend in front of a television screen has been declining steadily from a high of three hours in 2000/2001 and was at 2.3 hours last year. However, time online has seen a huge surge, up 50% from two hours last year.

Reports surfaced last week that Amazon was in secret talks with grocery delivery service Ocado. Does the speculation foreshadow an imminent UK launch of AmazonFresh? For some industry analysts, a deal between Ocado and Amazon would be of huge benefit to the latter. A tie-up would allow Amazon to tap into the online supermarket's distribution, grocery sourcing and logistics network, moving it out of the realms of dabbling and into the arena of serious grocery retailers.

Coke Life will contain 45% less sugar than regular Coke from April, instead of 33% less sugar, as food and drink companies continue to reformulate products in response to consumer change and a harsher regulatory climate. Coke Life, which was launched in the UK in September 2014, is sweetened with a mix of sugar and stevia plant extract and the recipe has been changed to include a greater level of the latter. A 330ml can of Coke Life will now contain 76 calories and 19 grams of sugar.

"The Guardian" is to slash its costs by GBP54 million over the next three years and could begin charging for some of its content after burning through GBP80 million of cash in only a year. David Pemsel, the chief executive of Guardian News & Media, told staff that he had no option but to cut operating costs by a fifth after revealing that the media group's cash pile had fallen from GBP838.3 million to GBP735 million in the year to March 31.

Adidas' sponsorship of the International Association of Athletics Federations has been on volatile terms "for some time now" and the sports brand feels it now has "valid grounds" to pull out. And one source says there has been growing tension between Adidas and the IAAF. "Obviously the overall drug issues are a big factor but the IAAF's decision to host the 2021 World Championships in Eugene, Oregon, which is obviously Nike's HQ, did not go down well at all," he told "Marketing Week."

McDonald's is planning to speed up the rollout of table service and expand a trial of its premium burgers as the fast food brand says its turnaround strategy is beginning to pay off. CEO Steve Easterbrook said that so far a quarter of McDonald's 1,200 restaurants in the UK have been converted to offer customers self-order kiosks, digital merchandising and customised order points. McDonald's will also introduce table service, currently on trial in 14 locations, to "nearly all" converted restaurants in 2016.

Google has issued a $5.3m grant to non-profits in Germany in a philanthropic gesture intent on helping newly settled refugees connect to the Web. Looking to support Project Reconnect, a program by NetHope, Google has made a substantial donation to the fund equipping non-profits working with refugees in Germany with Chromebooks. The Chromebook donation has been touted as a way to connect the refugees with greater opportunities as they settle in Germany.

Sky has invested $10 million (GBP7.0 million) in DataXu, a Boston-based software company that specialises in programmatic ad tech. The American company partners with advertisers and media agencies in programmatic marketing, with data-driven planning and trading across multiple platforms. Sky Media, the broadcaster's ad sales arm, will use DataXu's capability in the development of Sky Advance, the platform it launched in October which can deliver sequential advertising to viewers on video on demand and online.

Despite the free tips, Dorsey is off to a rough start. After a brief rally, when his appointment was confirmed in October, Twitter's sharp fall has continued. The 38% share price plunge since his return, combined with a parallel decline at Square -- the mobile payments company where he is also chief executive -- has even seen him briefly relegated from billionairedom to the ranks of the merely extremely wealthy.