---
title: 2024 Optimizely Experimentation Analytics release notes
slug: experimentation-strategy/release-notes/2024-optimizely-experimentation-analytics-release-notes
docTags: 
createdAt: 2026-08-07T22:08:45.169Z
---

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:::hint{type="info"}
**Products**

- Optimizely Web Experimentation
- Optimizely Personalization
- Optimizely Optimizely Performance Edge
- Optimizely Feature Experimentation
- Optimizely Full Stack (Legacy)

The availability of features may depend on your plan type. Contact your Customer Success Manager if you have any questions.
:::

## 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 or [event properties](docId:3kGIZlCkODJIOJuT3bdWo) in Feature Experimentation.

Swift SDK does not currently support nesting the event properties object within tags. Optimizely is working on an update.

## October

Released event properties to open beta. See [Custom events](docId:1okSTW6eZjYr1urn1-xpr) in Web Experimentation or [event properties](docId:3kGIZlCkODJIOJuT3bdWo) in Feature Experimentation.

## 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) in Web Experimentation or [event properties](docId:3kGIZlCkODJIOJuT3bdWo) in Feature Experimentation.

## July

Removed **minor** as a possible health status for [Optimizely's automatic sample ratio mismatch detection](docId\:JFKBHyB1tPQH0-EMRjAOR). The SRM detection algorithm now reports [Good experiment health](docId\:Z1WUTCMzMyRPcL83fBraU) if your experiment is not experiencing an SRM or [Take action now: SRM detected experiment health](docId\:m9r0cVA9YdjxBaSQRsFla) if something is amiss with your experiment. See [Imbalance detected: What to do if Optimizely's automatic SRM detection alerts you to an imbalance in your Stats Engine A/B test](docId:2VGHBuvjNAJJnkir0LDTz).

## June

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

- Released the ability to use cross-project events to track events from your Optimizely Web Experimentation projects in your Optimizely Feature Experimentation project. See [Cross-project events](docId\:ZL_1cekoRgYONCLUBrv5b) for Feature Experimentation and [Cross-project events](docId:-o8WB8cFGt8qbpkbk3YMY) for Web Experimentation.
- Released the ability to [access the data Optimizely Experimentation ingests](docId\:h4Yq0EScsVQ8cJ0gzw0JM) in [BigQuery by Google Cloud](https://cloud.google.com/bigquery).