By setting a bookmark on RecentChanges you can easily see what has been changed since your last visit.

2008-08-10
[DELETED] Hanajima_Saki 20:59 Info 산오리 HanajimaSaki와 같은 내용의 문서
[DIFF] BadContent 20:59 Info Antispam subsystem [1]
localhost [2]		 #02 converted to 1.6 markup
[DIFF] FrontPage 20:26 Info 산오리
[DIFF] 옛날공지사항 20:20 Info 산오리
2008-02-10
[DIFF] LocalBadContent 15:05 Info 산오리
2007-10-24
[DIFF] 한글고스트단어참고사전 12:57 Info 사랑농업
2007-10-20
[DIFF] 놀이터 14:04 Info 60
2007-07-18
[DIFF] KoreanGhosts 05:12 Info Chiri
2007-04-12
[DIFF] MinaseNayuki 12:02 Info 산오리
2007-02-25
[DIFF] NanikaFaq 16:23 Info 221

[DIFF]

marks older pages that have at least one backup version stored (click for an author diff)

[UPDATED]

marks pages edited since you set your bookmark (click for a bookmark diff)

[NEW]

marks pages created since you set your bookmark, and were not edited after creation

[DELETED]

marks page deletions

[RENAMED]

marks page renames

[CONFLICT]

An editing conflict happened, please resolve it by merging both versions of the problematic paragraphs together.