How to use "Daily LingQs" more effectively?

How does the LingQ system choose the “Daily LingQs” selection? What’s the algorithm doing?

I’ve read millions of words in LingQ but never bothered to do flashcards. I think I’m going to start and I probably will just start using the Daily LingQs. But I’d like to know how they are being chosen so I can figure out if that’s the right path.

你学习什么课程,就应该使用过滤功能专门筛选已经识学习过的词汇,这样可以保证你学到的词汇都是有映像的