Classroom

• Students who don't proof their work risk lower scores as teachers identify errors and take off points. Egregious errors can prevent teachers from understanding what the student intended to communicate, causing students to lose more points and possibly receive an F grade, since the teacher can't tell if the student understands the course content.
  
  

Interpersonal Communication

• Proofing in interpersonal communication is important, because serious errors can be embarrassing. Poor proofing leads to confusion and miscommunication. Serious miscommunication can offend friends. People might also not view the writer as intelligent.
  
  Quality of writing affects how people perceive it. When a piece of writing includes careless errors, people are less likely to take the writer seriously. Unreliable sources often have many typos; people may question the reliability of the writing based on typos.
  
  

Workplace

• Poor proofing in the business world can lead to a broad range of consequences. Failing to proof a resume can lead to errors that can cause the applicant to not be hired. Errors in released company documents and products can lead to embarrassment for the company and confusion for customers. With help documents, errors can be hazardous, as customers may perform tasks incorrectly, leading to products not operating properly. Poor proofing can cost companies money. For example, marketing materials with grammatical errors can lead to fewer customers buying products. Failing to proof when coding can lead to software that doesn't function properly, leading to recalls and lost customers.
  
  Proofing gives people an opportunity to look at the product a second time. Looking over the product a second time can help the proofer notice something that was previously overlooked, leading to improvements in the product.
  
  

Comprehension

• Typos make writing more difficult to read. Some people won't have the patience to continue reading writing that is difficult to understand because of typos and structural problems. Errors are distracting, which can cause readers to not pay attention to the parts of the text the writer wants them to focus on.
  
  

Technology Reliance

• Some people choose to rely on spell checkers to correct errors. However, spelling checkers don't always have full dictionaries and may not catch words that are spelled correctly, but aren’t the right word. For example, someone may accidentally type “fog” when she means to type “dog.” The spell checker would identify both words as being correct.