Yahoo email may be slow due to several factors. Common causes include an overloaded browser with too many open tabs or extensions, a slow internet connection, or a large volume of emails and attachments that can slow down performance. Outdated browser versions or Yahoo’s temporary server issues might also contribute to sluggishness. To improve speed, try clearing your browser’s cache, disabling unnecessary extensions, and ensuring a stable internet connection. Additionally, updating your browser and checking Yahoo's server status can help. If the problem persists, consider using a different browser or contacting Yahoo support for further assistance.