The Ignite Book of News give an overview of each announcement and has links to find more details about each announcement: https://aka.ms/ignite-book-of-news.

However you may like to bookmark this page and work your way through the blogs that attracted my attention, focused on Office, Teams, Viva, Collaboration, Security & Compliance.

Office 365, Teams & Collaboration

Modern Work (SharePoint, OneDrive, Lists, Teams, Office.com): https://techcommunity.microsoft.com/t5/microsoft-sharepoint-blog/rich-secure-content-and-collaboration-for-hybrid-work-ignite/ba-p/2892338?WT.mc_id=M365-MVP-5004583

Microsoft Lists Announcements: https://techcommunity.microsoft.com/t5/microsoft-sharepoint-blog/microsoft-lists-announcements-ignite-2021-nov-2-4/ba-p/2909696?WT.mc_id=M365-MVP-5004583

Office Mobile: https://techcommunity.microsoft.com/t5/microsoft-365-blog/see-the-latest-mobile-innovations-for-office/ba-p/2911682?WT.mc_id=M365-MVP-5004583

Office.com: https://techcommunity.microsoft.com/t5/microsoft-365-blog/creating-a-hub-for-your-content-with-office-com/ba-p/2911368?WT.mc_id=M365-MVP-5004583

PowerPoint Recording Studio: https://techcommunity.microsoft.com/t5/microsoft-365-blog/powerpoint-s-new-recording-studio-helps-you-tell-your-story-in/ba-p/2897166?WT.mc_id=M365-MVP-5004583

Microsoft Editor: https://techcommunity.microsoft.com/t5/microsoft-365-blog/microsoft-editor-is-now-superpowered-with-context-iq-to-help-you/ba-p/2897180?WT.mc_id=M365-MVP-5004583

Clipchamp becoming part of Office 365: https://techcommunity.microsoft.com/t5/microsoft-365-blog/meet-clipchamp-microsoft-s-new-video-editing-app-to-empower/ba-p/2901330?WT.mc_id=M365-MVP-5004583

Teams: https://techcommunity.microsoft.com/t5/microsoft-teams-blog/microsoft-ignite-fall-2021-innovations-coming-to-microsoft-teams/ba-p/2824127?WT.mc_id=M365-MVP-5004583
Mesh for Microsoft Teams: https://news.microsoft.com/innovation-stories/mesh-for-microsoft-teams/

Microsoft Loop: (Loop components were previously announced as Fluid Components) https://www.microsoft.com/en-us/microsoft-loop

File Experiences: https://techcommunity.microsoft.com/t5/microsoft-onedrive-blog/what-s-new-and-coming-to-files-experiences-in-microsoft-365-at/ba-p/2902614?WT.mc_id=M365-MVP-5004583

Teams Connect (Shared Channels): Shared Channels allow you to work across organizations in Microsoft Teams channels, WITHOUT switching organisation. Now due Public Preview early 2022. Register to hear when the preview is available: Introducing Microsoft Teams Connect

Microsoft Planner and Project: a look at what’s to come: https://techcommunity.microsoft.com/t5/planner-blog/microsoft-planner-and-project-a-look-at-what-s-to-come/ba-p/2875083?WT.mc_id=M365-MVP-5004583

Hyper Connections – collaborative apps across Microsoft dynamics 365, power platform, office and teams https://cloudblogs.microsoft.com/industry-blog/digital-transformation/2021/11/02/build-a-hyperconnected-business/?WT.mc_id=M365-MVP-5004583

Microsoft Forms Collections. Though this was announced back in September is it now rolling out: https://techcommunity.microsoft.com/t5/microsoft-forms-blog/manage-your-forms-with-collections/ba-p/2758921?WT.mc_id=M365-MVP-5004583

Microsoft Viva

Viva Topics: https://techcommunity.microsoft.com/t5/microsoft-viva-blog/microsoft-viva-topics-helps-unleash-collective-knowledge-with/ba-p/2912194?WT.mc_id=M365-MVP-5004583
New Viva Insights capabilities help foster wellbeing and productivity across a hybrid work culture: https://techcommunity.microsoft.com/t5/microsoft-viva-blog/new-viva-insights-capabilities-help-foster-wellbeing-and/ba-p/2901378?WT.mc_id=M365-MVP-5004583

Viva Learning now generally available: https://techcommunity.microsoft.com/t5/microsoft-viva-blog/viva-learning-now-generally-available/ba-p/2898228?WT.mc_id=M365-MVP-5004583
Deploy Microsoft Viva with ease across your organization: https://techcommunity.microsoft.com/t5/microsoft-viva-blog/deploy-microsoft-viva-with-ease-across-your-organization/ba-p/2911420?WT.mc_id=M365-MVP-5004583

Announcing new Microsoft Viva partner integrations: https://techcommunity.microsoft.com/t5/microsoft-viva-blog/announcing-new-microsoft-viva-partner-integrations/ba-p/2911173?WT.mc_id=M365-MVP-5004583

Microsoft Viva Suite Subscription: Microsoft Viva is now generally available to help transform your hybrid work experience – Microsoft 365 Blog

Stream migration from classic to new Stream built on SharePoint is now in preview (no blog yet)

Power Platform enhancements including more integration with Teams and a PowerApps Pay-As-You-Go subscription plan New Power Platform capabilities announced at Microsoft Ignite – Microsoft Power Platform Blog

Security & Compliance

Security & Compliance (there a lots of links to details of the announcements in this article): https://techcommunity.microsoft.com/t5/microsoft-sharepoint-blog/what-s-new-in-security-and-compliance-in-sharepoint-onedrive-and/ba-p/2910640?WT.mc_id=M365-MVP-5004583

Extending Compliance, Risk & Privacy Platforms: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/extending-compliance-risk-and-privacy-platforms/ba-p/2870639?WT.mc_id=M365-MVP-5004583

Microsoft Information Protection: Enhanced Automatic Classification Capabilities: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/microsoft-information-protection-announcing-enhanced-automatic/ba-p/2871144?WT.mc_id=M365-MVP-5004583

Threat and vulnerability management support for Android and iOS: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/reduce-risk-across-your-environments-with-the-latest-threat-and/ba-p/2902691?WT.mc_id=M365-MVP-5004583

Document Version Insights with Microsoft Advanced eDiscovery: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/discover-document-version-insights-and-more-with-microsoft/ba-p/2898961?WT.mc_id=M365-MVP-5004583

Insider Risk Management Enhancements: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/drive-efficiency-and-accelerate-time-to-action-in-managing/ba-p/2902373?WT.mc_id=M365-MVP-5004583

App Governance: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/announcing-the-general-availability-of-app-governance/ba-p/2902810?WT.mc_id=M365-MVP-5004583

Microsoft Compliance Manager: extensibility beyond Microsoft 365: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/microsoft-compliance-manager-extensibility-beyond-microsoft-365/ba-p/2883896?WT.mc_id=M365-MVP-5004583

Microsoft Endpoint Data Loss Prevention for macOS: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/announcing-the-availability-of-microsoft-endpoint-data-loss/ba-p/2902847?WT.mc_id=M365-MVP-5004583

Expanded DLP coverage: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/announcing-expanded-dlp-coverage-to-new-file-and-content-types/ba-p/2902869?WT.mc_id=M365-MVP-5004583

Warn and Educate Users on Risky App Usage: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/warn-and-educate-users-on-risky-app-usage/ba-p/2630982?WT.mc_id=M365-MVP-5004583

Microsoft Defender for Cloud Apps: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/announcing-microsoft-defender-for-cloud-apps/ba-p/2835842?WT.mc_id=M365-MVP-5004583

Microsoft Defender for IoT: How Microsoft Defender for IoT can secure your IoT devices – Microsoft Security Blog

Microsoft Information Governance: New Ways to Govern Your Data in Microsoft Teams: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/microsoft-information-governance-new-ways-to-govern-your-data-in/ba-p/2815238?WT.mc_id=M365-MVP-5004583

Microsoft Sentinel introduces enhancements in machine learning and productivity https://techcommunity.microsoft.com/t5/microsoft-sentinel-blog/microsoft-sentinel-introduces-enhancements-in-machine-learning/ba-p/2897871?WT.mc_id=M365-MVP-5004583

Protect your business with Microsoft Security’s comprehensive protection: Protect your business with Microsoft Security’s comprehensive protection – Microsoft Security Blog