docs: update changlog overview page

docs/changelog/changelog.mdx

@@ -9,29 +9,36 @@ tags: ['SDKs', 'changelog']
 import Button from '@site/src/components/button/Button';
 import ButtonShelf from '@site/src/components/button-shelf/ButtonShelf';
 
-Bucketeer is constantly updating its SDKs to provide a better use experience and better control over the feature flag usage. This section aims to maintain you informed about Bucketeer ongoing improvements and innovations. Select one of the available SDKs to find the latest updates, fixes, and features.
+Bucketeer is constantly updating its system and SDKs to provide a better user experience and better control over the feature flag usage. This section aims to maintain you informed about Bucketeer ongoing improvements and innovations. Select one of the available SDKs or the Core project to find the latest updates, fixes, and features.
 
-:::info GitHub Reselases
+:::info GitHub Releases
 
 All information provided here is also available in the GitHub repository of each SDKs.
 
 :::
 
 ## Core
 
+[Bucketeer](https://bucketeer.io/) is an open-source platform created by CyberAgent to help teams make better decisions, reduce deployment lead time, and release risk through feature flags.
+
 <div className="row" style={{maxWidth: '500px'}}>
 
   <div className="col--3 text--center">
     <a href="/changlog/core" className="brand-link">
-      <i className="core-icon"></i>
+      <i className="core-icon brand-icon"></i>
       <span>Core</span>
     </a>
   </div>
 
 </div>
 
-## Client-side SDK
+## SDKs
+
+Bucketeer provides server-side and client-side SDKs. For additional information on how they work, access the [SDKs](/sdk) documentation page.
 
+### Client-side SDK
+
+Client-side SDKs are designed for single-user desktop, mobile, and embedded applications.
 
 <div className="row" style={{maxWidth: '500px'}}>
 
@@ -58,7 +65,9 @@ All information provided here is also available in the GitHub repository of each
 
 </div>
 
-## Server-side SDK
+### Server-side SDK
+
+Server-side SDKs are designed for multi-user systems and intended for use in trusted environments, like corporate networks or web servers.
 
 <div className="row" style={{maxWidth: '500px'}}>
 

sidebars.js

@@ -249,7 +249,7 @@ const sidebars = {
     {
       type: 'doc',
       id: 'changelog/changelog',
-      label: 'Bucketeer Changelog',
+      label: 'Overview',
       className: 'sidebar-overview',
     },
     {