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I read the recommended title length is 50-60 characters depending on alphabets, etc,.
Anyways, my question is, is there any harm of having longer title?
If all my important keywords are within the 50-60 characters that will show up on search results, I can still make the title longer, it's just that those keywords outside won't have any effect on search results?

I have noticed Google image search has included suggestion tabs (e.g,. design, nature... when searching background) on the top of the image search.
Are there specific meta tags I can add into my images so that my images will show up on each tab?
Do those filters just show content based on image keywords or something else?

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