The intentions for this experiment are probably to help increase engagement. One could even argue that for content Twitter deems to be "breaking news," putting important tweets from the accounts a person's Twitter friends follow into that person's main timeline could be valuable.

The problem, of course, is that this experiment is a big change to the way Twitter has always worked. Part of what makes Twitter great is that the timeline is relatively unobstructed. You see tweets from individuals you choose to follow and the tweets they choose to retweet. It's not like Facebook.

Google Adwords The most popular online advertising platform, in use by marketers of all sizes, is Google AdWords. Up until early 2013, AdWords allowed advertisers to set up separate campaigns to target mobile devices. Best practice generally entailed targeting mobile, desktop and sometimes tablet users.

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