A notice of appeal is a short, largely administrative document — but it's also one of the strictest deadlines in litigation. File it late, and an otherwise winning appellate argument never gets heard at all.
The deadline usually isn't negotiable
Appellate deadlines are typically jurisdictional, meaning courts generally can't extend them for ordinary reasons, and they often run from the date judgment is entered, not from the date you learned about it.
What the notice actually needs to say
Beyond identifying the parties and the judgment being appealed, most rules require specifying which court you're appealing to and, in some jurisdictions, the specific issues or portions of the judgment being challenged.
Certain post-trial motions can pause the clock
Filing certain post-trial motions (like a motion for a new trial) within the deadline can toll or reset the appeal clock — worth understanding before assuming the appeal deadline is your only option after an unfavorable judgment.
Filing the notice is just the start
The notice of appeal opens the door to the appellate process — ordering the record, briefing schedules, and the brief itself all follow on their own deadlines once the notice is filed.