Grammar question.

[BabyMine]

I am finishing the invitations and need help with a sentence. Which one is correct?

1) Please check out this website for more information and updates.

2) Please check this website for more information and updates.

[ciw]

The second version is correct. You don't need to use the word "out."

[Fairy]

The latter. You check a website, you check out a library book. Or a person or interesting thing (e.g., "check it out, man, that is so cool!" or "check out this website I found, it is really wack."). But in your context, you simply check the website.

[sariana]

Honestly, I would say, "Please visit this website...."

But I agree with PPs that #2 is the correct version.

[citymama]

I would say "check back at this website..." or "here's the website for..." or "stay tuned for updates at www...." rather than either of those formulations. While I agree that "check this website" is grammatically correct, it isn't colloquially used, and so sounds more awkward.