Slack is built around search from the ground up. Every discussion, every decision, and every document is archived, indexed, and available through one search box. Slack also provide "deep search", which means users can search inside Word docs, Google Docs, PDFs, Photoshop files, commit messages — anything they add to Slack. Slack has really powerful search operators, Users are able to focus their search to just a specific channel, messages from a specific person, or to just the files that they've added to Slack. In addition users can filter results by recency, relevance or file type to find exactly what they need.