What do the bars indicate on the move log during games?

What do the bars indicate on the move log during games?

Time used. 

lol i thought that was the number and the bar was how good the move was . oops

They could put a column title in there.

You are not the first to make that mistake.

For two months I thought that it was like the analysis boards' best move difference. Until now, I'm still not sure what that is. It had me wondering why identical moves in openings had different values. Longer turns also 'coincided' with better moves - I thought my thinking actually had instant results. I just recently got over my stupidity but I still cringe at night. 

Wait....no way. It just means time used?

I was playing someone and noticed they had a couple of moves that got scored at 1:31.2 or something like that. It literally just means how long the move took....

1 minute, 31 seconds.

No way...everything I knew was a lie.