Nice picture, but don't see an advertisement here.
What are you advertising? A flower? A glass?
A bit more contrast may have helped the definition between the stucco & the flower.
This is undoubtably a nice photo of a daisy, as you say, in a champagne glass. But Advertising?
The highlights on the glass left and right are a little distracting, and the lump on the stem under the surface of the water is also a bit out of place.
Let's ask the obvious: what are we advertising here? I like the idea, the rough background just doesn't seem to fit to me. Your daisy is soft and smooth, just like the glass and the surface its sitting on (smooth, not soft). Anyways, just a suggestion, experiment!
you could be selling flowers, or water, or glasses, or photos. Neither the image nor the title specifies. You did a good job exposing the whites, so this would be good image to promote your photography with.
This is a very nice picture, but are you advertising daisies in champagne glasses? ;-) Still, I really like how many different shades of white you were able to capture in this image.