Gravity has a familiar physical meaning but also a nonphysical meaningâbasically seriousness. Thus, something grave possesses gravity. You can refer to the gravity of a person's manner, though public figures today seem to have a lot less gravity than they used to have. Or you can talk about a grave situation, as in the example sentence.
A wiki is a website where users can add, remove, and edit every page using a web browser. It's so terrifically easy for people to jump in and revise pages that wikis are becoming known as the tool of choice for large, multiple-participant projects.
Wiki's are as useful as google sites when it comes to gathering up information to store it correctly together. Wiki is different from this google site by allowing others (who you allow access) to edit the webpage as well. It can be useful for group projects, club's, and more.