Focus in writing is the central idea, theme, or controlling principle that guides the entire text, ensuring clarity and coherence by keeping all elements -- paragraphs, sentences, and details -- relevant to the main point often expressed as a thesis or focus sentence, and is achieved by defining the purpose, audience, and main argument before and during writing. 

Key Aspects of Focus in Writing: 
Thesis/Main Idea: The core message, controlling idea, or main point that all supporting details should relate back to. 
Purpose: Why you are writing and what you want the reader to understand or take away. 
Audience: Who you are writing for influences the level of detail and jargon used. 
Structure: A clear focus provides a narrative arc or logical flow, preventing tangents and rambling. 

How to Achieve Focus when Writing: 
Before writing:
Thesis/Main Idea: The core message, controlling idea, or main point that all supporting details should relate back to. 
Purpose: Why you are writing and what you want the reader to understand or take away. 
Audience: Who you are writing for influences the level of detail and jargon used. 
Structure: A clear focus provides a narrative arc or logical flow, preventing tangents and rambling. 

During writing: 
Topic Sentences: Ensure each paragraph has a clear topic sentence supporting the overall thesis. 
Relevance Check: Constantly ask if a sentence or detail serves the main point. 
Conciseness: Remove wordy phrases or unnecessary information that distracts from the point (e.g., "In Smith's writing, there are many indications of..." becomes "Smith's argument indicates..."). 

Editing:  
Review for Coherence: Check that paragraphs flow logically and support the thesis. 
Strengthen Sentences: Use techniques like end-focus (placing important info at the end) for clarity. 

Why Focus Matters: 
Clarity: Makes your writing easy for readers to follow and understand.
Effectiveness: Ensures your message is clearly expressed and memorable. 
Cohesion: Makes your work feel like a unified whole, not a collection of disjointed ideas.