Thanks - agree with what you said. However - which platform(s) do you use that let you arrange collections/series?
As far as I know - for Adobe - its kind of 'semi-automated' - so you can't really explicitly say that 'these images/videos belong together'...
And other platforms - varies from semi automated to none at all...
So while good in concept - I'm not sure how much it would effectively increase your sales unless you lucked out and had them automatically grouped together...
I do not really made collections, i just upload them regularly. I do not think it was necessary made collection or series.
I sold many times similar images from same series and I believe it was good upgrade for stock portfolio.
Yes in Adobe you can made collection and also on Pond5 I have some collections here.
But every stocker can have different experience. One good recipe do not exist.