Daily Nonogram

The aim is to color the whole grid into black and white squares.  At the top of each column, and at the side of each row, you will notice a set of one or more numbers.  These numbers tell you the runs of black squares in that row/column.  So, if you see 10 1, that tells you that there will be a run of exactly 10 black squares, followed by one or more white squares, followed by a single black square.  There may be more white squares before/after this sequence.

You can find more in-depth info on Wikipedia.