What is data quality?
Data quality refers to how reliable and usable the data is for its intended purpose. It determines whether a dataset can be trusted for reporting, analytics, and operational decisions.
Data quality software helps maintain these standards by identifying errors, inconsistencies, and data gaps. Many tools automate validation, anomaly detection, cleansing, and standardization, and may integrate with data management platforms to improve how data is stored, organized, and governed.
TL;DR: Data quality definition, dimensions, and improvement
Data quality determines the reliability of data for business decisions, analytics, and operations. It is measured by accuracy, completeness, consistency, relevance, uniqueness, validity, and timeliness. High-quality data improves decision-making, revenue, marketing, and efficiency, while poor quality causes errors, risks, and missed opportunities. Organizations improve data quality through profiling, cleansing, standardization, governance, automation, and monitoring.
Why is data quality important?
Data quality is important because business decisions are only as reliable as the data behind them. Organizations use data to guide strategy, manage risk, optimize production, and understand customers. If that data is inaccurate or incomplete, it can lead to flawed insights and costly mistakes.
High-quality data enables accurate reporting, analytics, and performance benchmarking, while poor-quality data leads to flawed insights, operational risk, and missed opportunities. Conversely, poor-quality data can increase the risk of algorithmic bias and create major problems for a company.
The following statements outline how data can negatively impact a business that does not prioritize data quality.
- Inaccurate market data will cause companies to miss growth opportunities.
- Bad business decisions can be made based on invalid data.
- Incorrect customer data can create confusion and frustration for the company and the customer.
- Publicizing false data quality reports can ruin a brand’s reputation.
- Storing data inappropriately can leave companies vulnerable to security risks.
How is data quality measured?
The core dimensions of data quality are accuracy, completeness, relevance, validity, timeliness, consistency, and uniqueness. Together, these dimensions provide a structured framework for identifying weaknesses, prioritizing improvements, and maintaining consistent data standards across systems.
- Accuracy: How correctly the data reflects the information it is trying to portray.
- Completeness: The comprehensiveness of the data. If data is complete, it means that all the data needed is currently accessible.
- Relevance: Why the data is collected and what it will be used for. Prioritizing data relevancy will ensure that time isn’t wasted on collecting, organizing, and analyzing data that will never be used.
- Validity: How the data was collected. The data collection should adhere to existing company policies.
- Timeliness: How updated the data is. If company data isn’t as up-to-date as possible, it’s considered untimely.
- Consistency: How well the data stays uniform from one set to another.
- Uniqueness: Ensures there is no duplication within the datasets.
What are the benefits of high data quality?
High data quality improves the accuracy, efficiency, and impact of business decisions. Below are some of the key benefits organizations gain when their data is reliable and well-managed:
- Improved decision-making: Accurate and dependable data reduces trial and error, allowing organizations to make informed strategic changes with greater confidence.
- Increased revenue: Clear insights into market trends and customer needs help businesses act on opportunities before competitors.
- More effective marketing: Reliable audience data enables companies to refine targeting, align campaigns with their ideal customer profile (ICP), and adjust strategies based on real engagement patterns.
- Time savings: Collecting and maintaining only relevant, high-quality data reduces unnecessary analysis and manual corrections.
- Stronger competitive positioning: Quality industry and competitor data help organizations anticipate market shifts, respond faster, and support long-term growth.
What are some common data quality issues?
Common data quality issues arise from errors in data collection, storage, integration, and governance. These issues often stem from process gaps, system limitations, or human mistakes.
- Manual entry errors: Typos, incorrect values, or inconsistent naming caused by human input.
- Poor system integration: Mismatched records or data conflicts when multiple platforms such as CRM tools, analytics systems, or device enrollment platforms do not sync properly.
- Unstandardized data entry processes: Different teams using inconsistent formats or definitions.
- Lack of validation controls: Missing checks that allow incorrect or malformed data to enter systems.
- Shadow data and silos: Departments maintaining separate datasets that are not centrally governed.
- Improper data migration: Data corruption or loss during system upgrades or transfers.
- Weak governance oversight: No clear ownership or accountability for maintaining data standards.
What are the steps in a data quality management process?
A data quality management process typically includes assessing existing datasets, correcting errors, strengthening data sources, enforcing governance policies, and continuously monitoring performance.
- Conduct data profiling. Data profiling is a process that assesses a company’s current data quality.
- Determine how data impacts business. Companies must do internal testing to see how data affects their business. Data could help them better understand their audience or hinder successful demand planning. If data is negatively impacting a company, it is time to address data quality and take steps to improve it.
- Check sources. If a company is trying to improve its data quality, it should start from the beginning. Sources should be checked for quality and data security. If companies gather the data themselves, they should prioritize user experience to avoid mistakes in data collection.
- Abide by data laws. Incorrectly collecting and storing data can land companies in legal trouble. There should be clear guidelines on who can see data, where it can be kept, and what it can be used for. Following these laws closely also helps companies avoid using outdated or incorrect data by creating a system to securely remove it.
- Implement data training. Data only gets better when used correctly. Companies should prioritize training to help teams understand available data and utilize it effectively.
- Perform frequent data quality checks. After working so hard to improve quality, companies need to continue that momentum by prioritizing data quality control and conducting consistent data monitoring. This will help identify common mistakes and avoid costly data-driven errors before they occur.
- Collaborate with data experts. When in doubt, companies should lean on specialists in improving data quality. Data scientists and analysts can guide companies towards higher data quality and ensure compliance along the way.
Is data quality the same as data integrity?
Data quality and data integrity are not the same. Data quality focuses on whether the data is accurate and usable. Data integrity is broader and ensures data remains reliable, consistent, and protected throughout its entire lifecycle. Data quality is one component of data integrity.
| Category | Data quality | Data integrity |
| Definition | The condition of the data and whether it is fit for use | The assurance that data remains accurate, consistent, and protected over time |
| Primary focus | Usability and correctness | Preservation and protection |
| Key dimensions | Accuracy, completeness, relevance, timeliness, consistency, uniqueness | Includes data quality plus integration, validation, location intelligence, and data enrichment |
| Lifecycle coverage | Evaluates data at a given point in time | Maintains data reliability across its entire lifecycle |
| Goal | Ensure data can be trusted for decisions | Ensure data remains trustworthy and unchanged from creation to deletion |
Data integration, a part of data integrity, provides well-rounded insights. Location intelligence adds information about where data is sourced, and data enrichment analyzes data to give it meaning. With all of those processes working together, data integrity ensures data is collected as intended, secures the data both physically and logically, and prevents changes that could jeopardize quality and validity.
Frequently asked questions about data quality
Below are answers to common data quality questions.
Q1. What is an example of good-quality data?
An example of high-quality data is a customer database with verified contact details and no duplicate entries, which supports reliable reporting and targeted outreach.
Q2. What is an example of poor data quality?
An example of poor data quality is a product inventory system that fails to accurately reflect stock levels or to update them in real time. This can result in overselling items, delayed shipments, incorrect reporting, and frustrated customers.
Q3. How do you test for data quality?
Data quality is tested with validation checks like null value checks, format validation, boundary testing, completeness checks, and rule-based validation to ensure datasets meet standards.
Q4. What are the best practices for maintaining data quality?
Best practices include clearly communicating data standards, documenting errors and corrections, ensuring regulatory compliance, protecting sensitive data with data masking, and using automation to reduce manual mistakes and enforce consistent rules.
Learn more about algorithmic bias and how data quality directly influences fairness and accuracy in AI systems.
Alexandra Vazquez
Alexandra Vazquez is a former Senior Content Marketing Specialist at G2. She received her Business Administration degree from Florida International University and is a published playwright. Alexandra's expertise lies in copywriting for the G2 Tea newsletter, interviewing experts in the Industry Insights blog and video series, and leading our internal thought leadership blog series, G2 Voices. In her spare time, she enjoys collecting board games, playing karaoke, and watching trashy reality TV.
