What does Song of Solomon 8:6 mean?

Hold me close to your heart, like a seal pressed into wax, like a mark you never take off. Real love is as strong as death—unyielding, fierce, impossible to resist. Jealousy burns like a wildfire, a flame that nothing can put out. Song of Solomon 8:6 - Modern Text Bible

(This verse uses the imagery of a seal to show how love is meant to be permanent and unbreakable. The comparison to death and fire highlights love's unstoppable, consuming power.)