The structure of the essay is clear and well-organized. It begins with an introduction that presents the central topic and outlines the main points to be discussed. The essay then proceeds to explore the advantages and disadvantages of personal databases and institutional plagiarism checks in two separate sections, each with clear headings. The arguments are well-developed and supported with relevant evidence and examples. Additionally, the essay provides a thoughtful analysis of the future trends and challenges in this area, along with suggestions for improvement. The language used is precise, concise, and appropriate for the target audience, and the overall style is engaging and accessible. Overall, the essay effectively addresses the topic and meets the specified criteria.