> ## Documentation Index > Fetch the complete documentation index at: https://docs.migma.ai/llms.txt > Use this file to discover all available pages before exploring further. # Engagement Segments > Build audiences from real engagement — opened, clicked, or received — not just sends. ## Overview The segment editor in **Contacts → Segments** supports engagement-based filters alongside the usual tag, status, and custom-field filters. Pick an action — **Received**, **Opened**, or **Clicked** — and a time mode to express things like *"clicked any email in the past 14 days"* or *"never opened"*. Engagement segments refresh automatically as new opens and clicks come in, so an audience like *"VIP non-openers"* always reflects who's quiet right now. *** ## What You Can Express | Action | Mode | Reads as | | -------- | ------------------ | ------------------------------- | | Received | in past N days | "Got an email from us recently" | | Opened | in past N days | "Engaged recently" | | Opened | not in past N days | "Was engaged but went quiet" | | Opened | never | "Never engaged at all" | | Clicked | in past N days | "High-intent recently" | | Clicked | never | "No click in their history" | Each row has an **action**, a **mode** (in past, not in past, or never), and — for the time-bound modes — a duration in **days** or **hours**. You can stack multiple engagement rows in the same segment. Combined with tags, status, and custom fields, you can express things like *"Tagged VIP, subscribed, opened in past 30 days, has not clicked in past 30 days"* — your high-intent-but-not-converting cohort. Segments created from Migma's AI or API can also scope **Opened** and **Clicked** to a specific campaign. For example, you can target contacts who received a launch campaign but did not click it. Campaign-scoped filters use the campaign recipient log, so Migma only targets recorded recipients and fails clearly when the campaign activity is no longer retained. *** ## Common Recipes **Subscribed, received in past 90 days, not opened in past 60 days.** A win-back campaign target — they're still subscribed and getting your sends, but they've stopped engaging. **Tagged VIP, opened in past 14 days.** Recent openers from your top tier — high-intent, ready for an offer. **Subscribed, never opened.** Contacts who've stayed on your list but never engaged. Good for a final last-chance email before you suppress. **Clicked in past 7 days.** Hot prospects across all tags — try a follow-up sequence. *** ## How It's Tracked Migma updates each contact's last-received, last-opened, and last-clicked timestamps from the open and click pixels embedded in your sent campaigns. There's no separate setup — engagement segments work automatically once a campaign goes out and recipients start interacting with it. Open tracking depends on the recipient's email client loading images. Some clients (Apple Mail Privacy Protection, corporate mail gateways) pre-fetch every image, which can inflate open counts. Migma filters known bot opens from analytics — see [Bot Protection](/changelog#bot-protection) — but the engagement filter uses raw timestamps so it stays inclusive. Use **Clicked** when you want a higher-confidence signal. *** ## Limits * Time windows accept **1–365 days** or **1–8760 hours**. * Campaign-scoped filters are supported for **Opened** and **Clicked** while the campaign recipient log is retained. * Segments cap at **100,000 matching contacts** for live count display — larger audiences show as `>100K` and still send normally. * Engagement membership refreshes on each access, so a segment opened twice five minutes apart may differ if a recipient just opened an email in between. *** ## Related Add tags and custom fields you can combine with engagement filters. See per-campaign open and click rates that feed these segments.