Core Features of Practical Law US include: 

Standard Documents and Clauses
Pre-drafted templates and clauses designed to assist legal professionals in drafting legal documents efficiently. Each document includes integrated drafting notes that provide context and guidance on usage.

Practice Notes
Plain-language explanations of legal topics and how they apply in practice. They cover a wide range of practice areas and are continually maintained by legal experts to reflect current law and practice.

Checklists
Step-by-step guides that outline procedures and considerations for various legal tasks, helping ensure that all necessary steps are addressed.

Matter Maps
Visual guides outlining the steps involved in various legal matters. Each step includes links to relevant Practical Law resources, aiding in task planning and execution.

What's Market
A tool that allows users to search, compare, and analyze agreements, public deal summaries, and market practices. It provides data-driven insights and visualizations of essential terms in documents and agreements.

Automated Documents
Tools that enable users to generate customized legal documents by answering a series of questions, streamlining the drafting process.

State Q&A
Jurisdiction-specific answers to common legal questions, facilitating comparative legal research across multiple states.

Toolkits
Collections of related resources, including practice notes, checklists, and standard documents, organized by topic to assist with specific legal tasks.

Legal Updates
Regularly updated information on legal developments, including changes in laws and regulations, to keep users informed about recent changes.

Presentation Materials
Resources designed to assist legal professionals in preparing presentations, including slides and other materials, to communicate legal information effectively.

Generative AI and Dynamic Tools available in upgraded subscriptions include: 

Search & Summarize Practical Law
A generative AI-based tool that allows users to input natural language questions and receive synthesized summaries of relevant Practical Law resources, streamlining the research process.

Knowledge Map
An interactive visual tool that displays related Practical Law resources on a particular topic, helping users to navigate and identify relevant materials efficiently.

Interactive Matter Maps
Customizable visual guides outlining the steps involved in various legal matters. Each step includes links to relevant Practical Law resources, aiding in task planning and execution.

Quick Compare
A feature that enables users to create custom charts that compare legal information across multiple jurisdictions, assisting in identifying differences and similarities in local laws.

What's Market Analytics
A tool that allows users to search, compare, and analyze agreements, public deal summaries, and market practices, providing data-driven insights and visualizations of essential terms in documents and agreements. 

Practical Law was originally founded in London in 1990, and was acquired by Thomson Reuters in 2013.