[header] How to bend a note on guitar [title] Use bends for a unique, bluesy way to transition between notes. [step] Bending guitar strings are how you put personality into your notes, taking basic scales like the blues pentatonic and molding it to fit your unique musical ideas. Bends, appropriately, are a way to add " tone color " to your playing. 
They are accent notes, used for emphasis and improvisation. [substeps] All of the techniques and rules here should be, to pardon the pun, bent.