Test Strategy vs Test Plan

https://www.softwaretestingmaterial.com/test-strategy-vs-test-plan/

https://www.guru99.com/how-to-create-test-strategy-document.html
Download test Strategy document from above website.

Testing Levels: 4 

1. Unit
2. Integration
3. System Testing
4. Acceptance Testing

Test Strategy	Test Plan
Test strategy is a high level document which captures the approach on how we go about testing the product and achieve the goals.	Test Plan doc which contains the plan for all testing activities to be done to deliver a quality product.
Derived from BRD Business requirement document	From SRS document.
Static document. Once defined cannot be changed	Dynamic document, can be changed.
It is defined at organization level	Defined at Particular Project level
Prepared by Project Manager	By Test Lead or Test Manger
Components: ·         Scope and Overview (who will review and approve document) ·         Test Approach (Testing Process, Testing Levels, Roles and Resp of each team member, Types of testing(load, security, Performance Adding new defect, re-testing, Defect Triage, Regression testing & test sign off ) ·         Test Environment ·         Testing Tools (Automation & Test Management tools for execution) ·         Release control ·         Industry standards to follow ·         Risk Analysis ·         Test deliverables ·         Testing Metrics ·         Requirement Traceability Matrix ·         Risk and Mitigation ·         Reporting tool ·         Test Summary	Components: ·         Test plan identifier ·         References ·         Introduction ·         Test Items ·         Features to be tested ·         Features not to be tested ·         Approach ·         Pass/Fail Criteria ·         Suspension Criteria ·         Test Deliverables ·         Testing tasks ·         Environment Needs ·         Responsibilities ·         Staffing and Training needs ·         Schedule ·         Risks and contingencies ·         Approvals