Add streak email docs

experimentation/trophy-impact-score.mdx

@@ -7,7 +7,13 @@ icon: percent
 
 ## What Is The Trophy Impact Score?
 
-By default, Trophy only enrolls 90% of your users in any gamification emails. It leaves the other 10% out as a 'control cohort'.
+Trophy has a built-in A/B testing feature that allows you to test the impact of your gamification features on retention and engagement.
+
+Through manipulating the [Control Ratio](#customizing-the-control-ratio), you can assign a certain percentage of your users to a 'control cohort'. Each new user that you tell Trophy about will be automatically assigned to the control cohort or not based on this setting.
+
+Trophy then exposes the `control` attribute through the [GET user API](/api-reference/endpoints/users/get-a-single-user#response-control) to allow developers to hide gamification UI and features from users in the control cohort.
+
+Similarly, if you use the [Emails](/platform/emails) feature, Trophy only sends emails to users who are not in the control cohort.
 
 Trophy then automatically tracks the 14-day retention of the two cohorts and compares them, resulting in the Trophy Impact Score.
 
@@ -28,11 +34,13 @@ The Trophy Impact Score reflects the percentage difference in 14-day retention b
   cohort.
 </Tip>
 
-## Customizing the control ratio
+## Customizing The Control Ratio
+
+By default, Trophy will use a 90/10 ratio of non-control/control users. However, you can customize this as you wish.
 
 If you'd prefer to use a different ratio of control to non-control users then you can do so on the [Integration](https://app.trophy.so/integration) page.
 
-Use the slider to change the percentage of your userbase that will be set as control users and opted out of gamification emails.
+Use the slider to change the percentage of your userbase that will be set as control users and opted out of gamification features.
 
 <Frame>
   <video

platform/emails.mdx

@@ -9,9 +9,9 @@ Trophy can send automated emails to users based on key triggers without requirin
 
 ## Types Of Emails
 
-Trophy supports 3 types of emails, each of which is designed to suit a common scenario in building gamification experiences.
+Trophy supports 4 types of emails, each of which is designed to suit a common scenario in building gamification experiences.
 
-All emails are optional, but all three can be used simultaneously and can be controlled from the [Emails](https://app.trophy.so/emails/configure) page in the Trophy dashboard.
+All emails are optional, but all four can be used simultaneously and can be controlled from the [Emails](https://app.trophy.so/emails/configure) page in the Trophy dashboard.
 
 <Frame>
   <img height="200" noZoom src="../assets/platform/emails/email_types.png" />
@@ -37,6 +37,10 @@ Emails are sent as follows:
 - After 14 days of inactivity
 - After 30 days of inactivity
 
+### Streak Reminder Emails
+
+Streak reminder emails are automatically sent to users up to 4 hours before they are about to lose their [Streak](/platform/streaks).
+
 ## Designing Emails
 
 Trophy has a fully-featured block-based email builder that allows you to design templates, controlling all email copy and subject lines. Within the [Emails](https://app.trophy.so/emails/configure) page you can create templates and assign them to the 3 different [Email Types](#types-of-emails).
@@ -530,30 +534,41 @@ Additionally, the editor support pluralization. In the below example we show dif
 
 ## Email Customization
 
-On the [Configure](https://app.trophy.so/emails/configure) page you'll find a couple of different settings you can control to manage email design across your Trophy account.
+### Aggregation Period
 
 <Frame>
   <img
     height="200"
     width="75%"
     noZoom
-    src="../assets/platform/emails/email_customization_settings.png"
+    src="../assets/platform/emails/aggregation_period_setting.png"
   />
 </Frame>
 
-### Aggregation Period
+The aggregation period controls the timeframe over which blocks like the [Progress Chart](#progress-chart) display usage. It also controls the frequency at which [Recap Emails](#recap-emails) are sent. Possible values are daily, weekly, monthly or yearly.
 
-The aggregation period controls the timeframe over which blocks like the [Progress Chart](#progress-chart) track usage. It also controls the frequency at which [Recap Emails](#recap-emails) are sent. Possible values are daily, weekly, monthly or yearly.
+Head into the [Integration](https://app.trophy.so/integration) page to manage this setting.
 
 ### Font Style
 
-Changes the font style used across all email templates. Additional styles are pulled from your Trophy account's [Branding](https://app.trophy.so/branding) settings.
+On the [email configure page](https://app.trophy.so/emails/configure), you'll find a setting to change the font style used in all emails.
+
+<Frame>
+  <img
+    height="200"
+    width="75%"
+    noZoom
+    src="../assets/platform/emails/aggregation_period_setting.png"
+  />
+</Frame>
+
+Other email styles are pulled from your Trophy account's [Branding](https://app.trophy.so/branding) settings.
 
 ## Send-time Optimization
 
-By default all emails sent by Trophy are sent at **17:00PM ET**, however sending emails to users based on their local timezone usually results in better engagement rates.
+In most cases, emails sent by Trophy are sent at **17:00PM ET**, however sending emails to users based on their local timezone usually results in better engagement rates.
 
-That's why if through [User Identification](/platform/users#param-tz) you specify a timezone for each user, Trophy will optimize the send-time for you.
+That's why if through [User Identification](/platform/users#param-tz) you specify a timezone for each user, Trophy will optimize the send-time for you by sending emails to users at 17:00PM in their local timezone.
 
 ## Setting up Emails