1. "You can discover how page edition works and create new pages."
"edition" is a noun meaning version not a verb meaning editing
May I suggest: "You can discover how page editing works and create new pages."
2. "Table with 2 rows of headers"
No, it is a table with one column and one row of headers.
3. "XWiki allows you to create link to other pages on the wiki and on the web:"
"create links to pages" not "create link to pages"
"on the wiki and on the web:" You would link to pages "in the wiki", not "on the wiki", but web pages would still be "on the web" (funny language isn't it?)
May I suggest: "XWiki allows you to create links to other pages in your wiki or on the web:"