I thought of purchasing the tickets for Louvre Museum from its official site, but there is no mention about ability to skip the queues. I read that there is a huge queue to enter.
Does buying official Louvre tickets in advance allow me to skip these lines?
Why do I need to pick a time when I do the booking? Does it mean that I have to be there at that time to enter the Museum?
It says so on the link you've shared:
"Book tickets online To avoid waiting in line, you can buy your tickets online.* * Online ticketing service available in French, English, and Spanish. Enjoy your visit!"
So the answer to your question is, YES, you can avoid the queues.
Timed tickets require you to enter within the stipulated window. That's how they ensure pre-bookers aren't required to stand in lines.
