Productivity for B2B marketers includes waking up and diving into work with to-do lists looking the amazon forest. By the end of the day, you realize you have been busy all day doing nothing productive.
Hence no results
Science has shown that focusing on one task alone would help you complete the each task faster and efficiently instead of trying to do it all at the same time.
There is a huge difference between busy and being productive, being busy involves activities with no specific goal or no benefit but being productive involves work related activities with an end game of seeing results and achieving something.