YouTip

## 404 NOT FOUND! Sorry, the article you are looking for does not exist!! The 404 page is an essential part of any website, playing a crucial role in user experience and SEO optimization. A 404 error occurs when a user visits a page that doesn't exist or has been deleted on the website, and the server returns a 404 status code. If the site owner hasn't set up a custom 404 page, dead links may appear, which can hinder search engine crawling and indexing. ## Origin of the 404 Not Found Error It is said that before the third technological revolution, the internet was essentially a large central database located in room 404. At that time, all requests were manually processed. If the requested file couldn't be found in the database or if the user entered an incorrect file number, they would receive a message: room 404 : file not found. After the internet emerged, people gradually adopted 404 as the standard error code for "file not found" by the server. Of course, in reality, there is no such room 404. ## Two Major Benefits of Setting Up a 404 Page * Guide users to stay on the site instead of leaving, enhancing user experience. * Prevent broken links from appearing on the website. Learn more about (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") * [Skills (Skills)](https://example.com/skills/skills-tutorial.html "Skills (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")