Chris has covered the technique, Nick the mental image. Suggest you try listening to different versions of well known tunes by 'name' artists and see how each one performs it. Sweet Home Chicago is a good starting point. Have a listen to Robert Johnson's original. Try Eric Clapton's version which is now the standard. Then try the Blues Brothers version, Stevie Ray Vaughn, Buddy Guy...
When you find a group of names playing it, listen to each one's interpretation..... Ask how/why/what's different.
Work out what feel each one gives the tune. What have they added to give a different, personal feel.... Now ask yourself how you feel about it. How would you lik to express/perform it...