What marketers can learn from Sainsbury's #MealDeal rebrand

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Sainsburys faced some interesting social media comments today via Twitter, as it revamped and rebranded its lunchtime meal deal offering.
According to its official Twitter feed, it has changed packaging, ingredients and the items available in a £3 meal deal as of today.
Its 'On the Go' products are now fresher, more varied and include more choice for consumers, its Twitter feed claims, but many tweets suggest that their usual products have been...