Breadcrumbs` are a trail of events that occurred in an application leading up to the primary error, providing critical context to errors that a stack trace alone can't provide. Breadcrumbs have been found to be incredibly helpful in reproducing the steps that led to the error being debugged. Sentry has recently introduced support for breadcrumbs on multiple platforms including browser JavaScript, Python, and PHP, with more platforms on the way. The introduction of breadcrumbs is part of Sentry's ongoing effort to help developers quickly fix issues by providing a trail of events leading up to the primary error.