Structured data, also known as schema markup, is a standardized format for providing additional context and metadata about web content to search engines. It helps search engines understand the content and purpose of a webpage, leading to enhanced search results such as rich snippets, knowledge panels, and carousel listings. Inconsistent structured data refers to errors or discrepancies in structured data markup across webpages, such as missing or mismatched schema types, properties, or values. Inconsistent structured data can confuse search engines and hinder the display of rich snippets or enhanced search features in search results. Webmasters should ensure consistent implementation of structured data markup across webpages to improve search engine visibility and user experience. To address inconsistent structured data issues, webmasters should use Google's Structured Data Testing Tool to validate markup, fix any errors or warnings reported by the tool, and adhere to Google's structured data guidelines and best practices. They can also monitor search appearance and performance in Google Search Console for rich snippets and other structured data features.