Proper Title - The title should be descriptive 4-8 words with (if applicable) the location. Bad example “Sunset in Flic en Flac”. The title is of utmost important for Google so the page can be indexed correctly (SEO purpose). Having a descriptive Title helps the photo to stand out and more importantly tells Google what your photo is about.
Proper description – Take some time describe your photo. Look at what is in the picture and describe it. What is it all about? Are there people doing something? Any reflection happening? The history of the place? Anything particular with the colors? The weather that day? The history behind you making this shot?
Tags – Look at Tags as categories. In what category should your photo lie?