Data analysis is the collection and processing of various information from various online interactions with target markets using practical methods and modern software. These online engagements can take the form of web searches, online purchases, content consumption, or other traces related to your business. The abundance of web tools available for monitoring data on many platforms has made it much easier for marketers to analyze data and make relevant marketing decisions. Marketers should be aware of the term "data sanitization," which describes the process of removing inaccurate, redundant, or incomplete data from a database. In order to make wise decisions, it is recommended to update the database regularly and remove irrelevant information. Effective online marketing also requires performance monitoring and evaluation, and data analysis makes that possible.