The line goes down?

I know absolutely nothing about stocks. My eyes glaze over if you try to explain the stock market to me. I could be wrong, but isn’t it bad when the line goes down?

I also suspect that it is bad when prices at the grocery store go up, as they’ve been doing lately.

I’ll try not to fall asleep if you explain to me what I’m getting wrong.

I did try to puzzle it out for myself, so I went to some site called Marketwatch to read some articles. This is what it looked like this morning.

I tried, but I got bored. Maybe I’m misunderstanding this, but it doesn’t look like good news for the stock market.