The definition of quality is "the standard of something as measured against other things of a similar kind; the degree of excellence of something." Or, "a distinctive attribute or characteristic possessed by someone or something." 

Today, I strongly encourage you to use the second idea of just focusing on a distinctive attribute or characteristic possessed by your subject. This prompt is not a requirement to post your best quality image.  I challenge you to really think about what quality says to you today.  For example, this was taken with my cell phone, which isn't a camera I consider to be of very high quality, but I do love the quality of time I spent with these beautiful birds today.  They hung outside my office window all day and then, when I was ready to leave, I enjoyed watching them make their way into their pond for the evening.