The 'Businesses @ Work' report from Okta analyzes cloud application trends across various industries and customer segments, using anonymized data from a vast network of applications and daily user authentications. Key findings include the rise of cloud app adoption, the coexistence of Microsoft Office 365 and Google Apps, and the significant impact of Slack as a growing communication tool within enterprises. The report emphasizes that traditional software companies are successfully transitioning to cloud services, with increased security measures like multi-factor authentication becoming commonplace among businesses.