(NASDAQ: ROKU) just updated investors with what was a mostly positive report. Though the streaming platform beat its internal guidance and met Wall Street's expectations for earnings per share, its shares fell on the report and are down 21% this year.

Possibly the worst metric was its average revenue per user, which declined 4% from last year. But that's not as bad as you might think -- in fact, it's a good thing. Here's why.

Roku has had a few tough years. It's growing its streaming platform, but the road has been pumpy. The company went from unexpected profitability back to losses. It's been trying to dig itself out of that, but given the challenging conditions in advertising, it hasn't been simple.

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Source Fool.com