YouTip

## 404 NOT FOUND! Sorry, we couldn't find the article you need!! The 404 page is an essential part of any website, carrying the responsibility for user experience and SEO optimization. A 404 page usually appears when a user visits a page that does not exist or has been deleted on the site, and the server returns a 404 error. If the webmaster doesn't set up a 404 page, dead links will appear, which can negatively impact search engine indexing when crawlers access such URLs. ## Origin of 404 Not Found Legend has it that before the Third Industrial Revolution, the form of the Internet was a large central database located in Room 404. At that time, all requests were manually completed by humans. If the requested file could not be found in the database, or if the requester had written the wrong file number, users would receive a return message: room 404 : file not found. After the rise of the Internet, people became accustomed to using 404 as the error code indicating that the server could not find the file. Of course, actual verification shows that the legendary Room 404 never existed. ## Two Major Benefits of Setting Up a 404 Page * Guide users not to close the website, enhancing user experience. * Prevent dead links from appearing on your website. See more about [HTTP Status Codes Introduction.](https://example.com/http/http-status-codes.html) !(https://example.com/wp-content/themes/tutorial/assets/img/404.jpg) (javascript:void(0);) * [Python / Data Science](javascript:void(0);) * (https://example.com/python3/python3-tutorial.html "Python Tutorial") * [Python2.x Tutorial](https://example.com/python/python-tutorial.html "Python2.x Tutorial") * (https://example.com/fastapi/fastapi-tutorial.html "FastAPI Tutorial") * (https://example.com/flask/flask-tutorial.html "Flask Tutorial") * (https://example.com/django/django-tutorial.html "Django Tutorial") * (https://example.com/numpy/numpy-tutorial.html "NumPy Tutorial") * (https://example.com/pandas/pandas-tutorial.html "Pandas Tutorial") * (https://example.com/scipy/scipy-tutorial.html "SciPy Tutorial") * (https://example.com/matplotlib/matplotlib-tutorial.html "Matplotlib Tutorial") * (https://example.com/dash/dash-tutorial.html "Dash Tutorial") * (https://example.com/jupyter-notebook/jupyter-notebook-tutorial.html "Jupyter Notebook Tutorial") * (https://example.com/pillow/pillow-tutorial.html "Pillow Tutorial") * (https://example.com/qt/qt-tutorial.html "Quantitative Trading") * (https://example.com/r/r-tutorial.html "R Tutorial") * (https://example.com/julia/julia-tutorial.html "Julia Tutorial") * [AI / Intelligent Development](javascript:void(0);) * [AI Agent (Intelligent Agent)](https://example.com/ai-agent/ai-agent-tutorial.html "AI Agent (Intelligent Agent)") * [AI (Artificial Intelligence)](https://example.com/ai/ai-tutorial.html "AI (Artificial Intelligence)") * (https://example.com/codex/codex-tutorial.html "Codex Tutorial") * (https://example.com/claude-code/claude-code-tutorial.html "Claude Code") * (https://example.com/opencode/opencode-tutorial.html "OpenCode") * (https://example.com/skills/skills-tutorial.html "Skills") * (https://example.com/ollama/ollama-tutorial.html "Ollama Tutorial") * (https://example.com/tensorflow/tensorflow-tutorial.html "TensorFlow Tutorial") * (https://example.com/pytorch/pytorch-tutorial.html "PyTorch Tutorial") * (https://example.com/sklearn/sklearn-tutorial.html "Scikit-learn Tutorial") * (https://example.com/ml/ml-tutorial.html "Machine Tutorial") * (https://example.com/langchain/langchain-tutorial.html "LangChain") * (https://example.com/nlp/nlp-tutorial.html "Natural Language Processing NLP") * (https://example.com/opencv/opencv-tutorial.html "OpenCV Tutorial") * (https://example.com/selenium/selenium-tutorial.html "Selenium Tutorial") * (https://example.com/playwright/playwright-tutorial.html "Playwright Tutorial") * (javascript:void(0);) * (https://example.com/html/html-tutorial.html "HTML Tutorial") * (https://example.com/html/html5-intro.html "HTML5 Tutorial") * (https://example.com/css/css-tutorial.html "CSS Tutorial") * (https://example.com/css3/css3-tutorial.html "CSS3 Tutorial") * (https://example.com/js/js-tutorial.html "JavaScript Tutorial") * (https://example.com/htmldom/htmldom-tutorial.html "HTML DOM Tutorial") * (https://example.com/typescript/ts-tutorial.html "TypeScript Tutorial") * (https://example.com/ajax/ajax-tutorial.html "AJAX Tutorial") * (https://example.com/json/json-tutorial.html "JSON Tutorial") * (https://example.com/tailwindcss/tailwindcss-tutorial.html "Tailwind CSS Tutorial") * (https://example.com/bootstrap4/bootstrap4-tutorial.html "Bootstrap4 Tutorial") * (https://example.com/bootstrap5/bootstrap5-tutorial.html "Bootstrap5 Tutorial") * (https://example.com/foundation/foundation-tutorial.html "Foundation Tutorial") * [Vue.js Tutorial](https://example.com/vue2/vue-tutorial.html "Vue.js Tutorial") * (https://example.com/vue3/vue3-tutorial.html "Vue3 Tutorial") * (https://example.com/react/react-tutorial.html "React Tutorial") * [Next.js Tutorial](https://example.com/nextjs/nextjs-tutorial.html "Next.js Tutorial") * (https://example.com/angularjs/angularjs-tutorial.html "AngularJS Tutorial") * (https://example.com/angularjs2/angularjs2-tutorial.html "Angular Tutorial") * (https://example.com/jquery/jquery-tutorial.html "jQuery Tutorial") * (https://example.com/jqueryui/jqueryui-tutorial.html "jQuery UI Tutorial") * (https://example.com/jeasyui/jqueryeasyui-tutorial.html "jQuery EasyUI Tutorial") ```