Here is a neutral, objective, and interesting summary of the text: To wish a coworker a happy birthday in Slack, users can integrate GIPHY, a platform with a vast library of GIFs, into their workspace. To add GIPHY to Slack, users navigate to Apps, search for it, click Add, and adjust settings such as channel selection and maturity ratings. Once integrated, users can share GIFs by typing `/giphy` followed by keywords or phrases, which are then searched through the platform's vast library. Users can also send GIFs with sound by selecting a clip from the dropdown menu. To avoid common mistakes, users should be mindful of their typing, use GIFs sparingly, and consider their audience before sharing. Additionally, users can automate GIF sharing using Zapier, which connects Slack with GIPHY to create custom workflows that deliver GIFs based on schedules or keywords.