diff --git a/public/roadmap-content/software-architect.json b/public/roadmap-content/software-architect.json
index e4d1a6892..5b0013822 100644
--- a/public/roadmap-content/software-architect.json
+++ b/public/roadmap-content/software-architect.json
@@ -496,7 +496,7 @@
   },
   "_U0VoTkqM1d6NR13p5azS": {
     "title": "Patterns & Design Principles",
-    "description": "",
+    "description": "In the realm of software architecture, patterns and design principles are foundational tools that enable architects to create robust, scalable, and maintainable systems. They offer proven solutions to common problems and guide decision-making throughout the software development lifecycle. Understanding these concepts is essential for anyone following a software architect roadmap, as they bridge the gap between high-level architecture and practical implementation.",
     "links": []
   },
   "AMDLJ_Bup-AY1chl_taV3": {
diff --git a/public/roadmap-content/system-design.json b/public/roadmap-content/system-design.json
index 4bd5d6fd3..75a6ce9a3 100644
--- a/public/roadmap-content/system-design.json
+++ b/public/roadmap-content/system-design.json
@@ -557,11 +557,11 @@
   },
   "fY8zgbB13wxZ1CFtMSdZZ": {
     "title": "SQL Tuning",
-    "description": "SQL tuning is a broad topic and many books have been written as reference. It's important to benchmark and profile to simulate and uncover bottlenecks.\n\n*   Benchmark - Simulate high-load situations with tools such as ab.\n*   Profile - Enable tools such as the slow query log to help track performance issues.\n\nBenchmarking and profiling might point you to the following optimizations.\n\nTo learn more, visit the following links:",
+    "description": "SQL tuning is the attempt to diagnose and repair SQL statements that fail to meet a performance standard. It is a broad topic and many books have been written as reference. It's important to benchmark and profile to simulate and uncover bottlenecks.\n\n*   Benchmark - Simulate high-load situations with tools such as ab.\n*   Profile - Enable tools such as the slow query log to help track performance issues.\n\nBenchmarking and profiling might point you to the following optimizations.\n\nTo learn more, visit the following links:",
     "links": [
       {
-        "title": "Optimizing MySQL Queries",
-        "url": "https://aiddroid.com/10-tips-optimizing-mysql-queries-dont-suck/",
+        "title": "Introduction to SQL Tuning - Oracle",
+        "url": "https://docs.oracle.com/en/database/oracle/oracle-database/23/tgsql/introduction-to-sql-tuning.html#GUID-B653E5F3-F078-4BBC-9516-B892960046A2",
         "type": "article"
       },
       {