Wikipedia is an amazing and insightful platform. For those interested, I enjoy editing and expanding articles, as well as conducting GA reviews and article assessments. I am familiar with what a good article is and what they should look like, so if you are ever in need of assistance contact me via my talk page.
I frequently use Twinkle - a tool to help with maintenance tasks and to deal with acts of vandalism or unconstructive edits. It provides rollback functions and includes speedy deletion functions, user warnings and welcomes, maintenance tags, semi-automatic reporting of vandals, and more.
I also use RedWarn - a tool to warn and report editors, request page protection and to assist editors in other moderation and maintenance tasks.
Another huge tool is Earwig. Earwig’s copy-vio tool allow editors to quickly check for any vandalism and compare texts to online websites. Earwig’s vandalism tool is crucial for the GA assessments (1 of the 6 criteria’s).
Without these tools a Wikipedia editor’s life would be significantly harder.