The 2015 Instagram Industry Report by Simply Measured analyzes the usage of Instagram by the top 100 global brands, revealing that 90% of these brands have Instagram accounts, with many engaging their audiences through strategic posting and the use of hashtags and emojis. It highlights key findings on engagement rates, the rise in posting frequency, and industry-specific tactics, noting that brands such as Starbucks and MTV excel in engagement by employing tailored content and maintaining an active presence. Overall, the report underscores Instagram's evolution into a crucial marketing platform for brands across various sectors.