My website is not avaliable, will i lose ranking?

[pompero99]

My website was not available during 12 hours and i think that i will lose ranking by that.

What do you think about it? Will i lose rankings?

Some URL were lost during the drop of server, what should i do? Create again? Delete on GWT?

Thanks so much.

[LesleyPaone]

This is straight from the horses mouth so to speak, https://www.youtube.com/watch?v=4eYJuT0yGrI

[RobertFisher]

The problem is beyond the site being unavailable for 12 hours. That is a small issue. YOu are stating that you lost URL's during this time, how? If the url was a ranked page, it won't rank if it doesn't exist.

[JaneCopland]

As Matt Cutts says in the video Prestashop links to, a short period of downtime should not hurt at all. Google understands that short outages happen fairly regularly. If you know that the site is going to be down for longer, try to serve a 503 server status, indicating that the site is "unavailable" rather than "not found" (404) or "gone" (410).

Some URL were lost during the drop of server, what should i do? Create again? Delete on GWT?

What exactly do you mean by this? That the rankings were lost or the files were deleted? If the files were deleted but you want those pages back, re-create the files and upload them again to the same location they lived in before, i.e. re-creating the same URLs. If you mean that some URLs lost their rankings but that the files / URLs still exist, you will need to wait a little while to see if their rankings come back. I expect that they will: a 12 hour downtime should not hurt you permanently.