--- title: 2024 Optimizely Web Experimentation release notes slug: web-experimentation/release-notes/2024-optimizely-web-experimentation-release-notes docTags: createdAt: 2026-08-05T20:57:20.623Z --- - Optimizely Web Experimentation Subscribe to updates on this page using the notification and RSS feed options. ## December - Released event properties, which let you attach additional information to an event to all customers. See[ Custom events](docId:1okSTW6eZjYr1urn1-xpr) in Web Experimentation - Revamped the Extensions feature – Extensions is now [Experience Templates](docId\:QANZ3gFOty4EplLUP9jba) (beta), which lets you streamline campaign and experiment creation and reduce code duplication. You can use the pre-built templates provided by Optimizely to quickly create a campaign or experiment with little to no development or build your own. See [Get started with experience templates](docId\:QANZ3gFOty4EplLUP9jba) for information. - Released the following UX delights: - You can open the desktop app with Optimizely's updated logo from the web app and log in directly from the browser. - You can automatically upload custom code into a Web Experimentation project directly from your GitHub repository through an out-of-the-box GitHub Action integration. - Optimizely informs users in the UI if they have insufficient permissions to enable or edit an integration. - Optimizely informs users if they input an invalid character in the list attribute name in real time. - You can reference the snippet versions from the UI to help ensure you deploy the most updated snippet. ## October Released event properties to open beta. See [Custom events](docId:1okSTW6eZjYr1urn1-xpr). ## September - Released [Optimizely Reporting for Experimentation](docId\:YWh1V46NbUVu2h0Wjy3zH), providing you with dashboards and reports that show key metrics such as experiment velocity, conclusive rate, win rate, and uplift. - Updated the **API Name** text field in the **New Custom Event** page to automatically populate with the **Name** formatted in lowercase, replacing any non-alphanumeric characters with underscores. See [Create a custom event](docId\:ypV0Nua-eeJYBUe2bvtZ5). - Released [Integrate Google Analytics 4 (GA4) Audiences](docId\:ZEdV7AKHOKwSBGN9hJIgr) for general availability. This lets you target experiments based on segments in GA4 without custom development, unlocking new targeting capabilities within Web Experimentation, such as demographics-based audience creation and predictive audience identification for potential purchases within a specified timeframe. - Released [contextual bandits](docId\:HEAGVaimK_ctRVAIDugxA) to beta for personalization campaigns. Contextual bandits help you deliver the most personalized variation to each user by dynamically re-allocating traffic based on the primary metric and user attributes. Contact your Customer Success Manager to learn more. ## August Released event properties to beta. Event properties let you filter a created event in Optimizely’s UI based on additional information you have attached to it. When you send events, you can add information about the product or action performed to create a more specific metric when using the event in the experiment results. Contact your Customer Success Manager or [sign up for the beta on Optimizely.com](https://www.optimizely.com/beta). See [Custom events](docId:1okSTW6eZjYr1urn1-xpr). ## July - Renamed the following [Optimizely REST API](docId\:ZAZ5ZXCZZoX11jsGkDjEZ) endpoints to clarify they archive the entities instead of deleting them: - [Archive an experiment](docId\:jpbNv1Xss4kA7Dd1M59Rd). - [Archive an in-page event](docId:3-wWeuWWD5wUIeBXKOZ6d). - [Archive a page](docId\:KsgkduOy34XYFE70OSOkJ). - [Archive a campaign](docId\:MdaZpWoHhh1G8nxBB8BAB). - [Archive an attribute](docId\:fZEqVJpCTjRrc07m5jxro). - Added a **Concluded** status for experiments to stop serving variations. You can mark whether the outcome was **Positive**, **Negative**, or **Inconclusive**, then give a **Description** of the findings. See [Manage experiments](docId\:qzbXoE8XeYomBkiN552e2) for information. ## June - Upgraded the [Chrome Extension](docId\:jVu6U7iUVH_1tJ_orpAZI) from Manifest V2 to Manifest V3 with Google phasing out Manifest V2 extensions. This upgrade improves security, privacy, and extension performance while maintaining all existing functionality. - Released the ability to sign up for email notifications when Optimizely Experimentation detects a [sample ratio mismatch](docId\:JFKBHyB1tPQH0-EMRjAOR) in your running experiments. See[ Enable email notifications in Optimizely Experimentation](docId\:BU9xpaNSi4fHfBQ36bOdr). ## May - Updated the Optimizely Personalization UI by renaming **Experiments** to **Optimizations** and surfacing **Personalization Campaigns**, making it easier to create and manage campaigns. - Renamed and released Advanced Audience Targeting to [Real-Time Segments for Web Experimentation](docId:8r8kPcfPk_gyXkMubzNwK). This lets you use [Optimizely Data Platform (ODP) real-time segments](docId:7-qDl01uxXDPl5_jFVF1E) to build your Web Experimentation audiences. - Released the ability to use cross-project events to track events from your Optimizely Feature Experimentation projects in your Optimizely Web Experimentation project. See [Cross-project events](docId\:ZL_1cekoRgYONCLUBrv5b). ## April - Released [targeting dynamic selectors](docId\:kBsYHK6tsyKG28r2T_6Xq) for general availability. This lets you use the Visual Editor to target specific attributes for your dynamic website or single-page application (SPA) more reliably and with a lower configuration time. - Released the ability to [link a hypothesis in Collaboration with an experiment in Optimizely Web Experimentation](docId\:iN5OAGPyb6fufERty75Xv). ## March - Updated the Test URL(s) to save after leaving the page settings. This lets you revisit the settings to see the page conditions and the effects of adjustments to those conditions. - Added an **ID** column for Audiences and Extensions to retrieve the information faster. - Updated the **HTML** box to be collapsible in the Visual Editor. ## February - Released [targeting dynamic selectors](docId\:kBsYHK6tsyKG28r2T_6Xq) to beta. - Released [Integrate Google Analytics 4 (GA4) Audiences](docId\:ZEdV7AKHOKwSBGN9hJIgr) to beta.