Since the mid-2000s, people have been talking about Web 3.0. Around 2005, the way consumers use the Internet has changed, especially in China, South Korea and Japan. People began to use the Internet for less social activities and more professional activities. Websites become effective tools because they can provide a variety of functions, including online business transactions. Web 2.0 emerged in 2007 and changed everything again. It focuses on letting users control their personal data and allowing them to quickly and easily create their own websites. What are Web 3.0 and Web 2.0? Web 3.0 refers to the current generation of Internet technology, while Web 2.0 refers to the previous generation. Both have similar characteristics, but there are significant differences in the methods of providing information. Web 2.0 and Web 3.0 have a lot in common. They all originate from the World Wide Web itself. Many of the same techniques are used. Both depend on the same protocol and language. But there are some major differences. Web 2.0 focuses on user interaction with other systems and devices. By using computer languages such as JavaScript, HTML and CSS, the creation and operation of Web 2.0 search engines have been strengthened. Web 2.0 developers believe in the emergence of communities and people's social experience of technology. On the contrary, Web 3.0 focuses more on content creation. Websites such as Tumblr, Pinterest and Instagram are examples of this. These platforms allow users to upload and publish photos and text. They are built with a simple interface, with little emphasis on content management systems. Most people who know nothing about coding can publish something online. Web 3.0 integrates many developments such as NFT, blockchain and DeFi. In Web 3.0, users are eligible to be DAOs. DAOs are a community led organization in which users can vote and make decisions at any time. At least you can relax. Without your consent, no one can use your information. Although Web 3.0 is built on the Web. 2.0, the future is worth shorting. In the past, search engines only indexed text-based documents, such as books, newspapers and magazines. They do not index audio or image files because they cannot handle these file formats. However, today's search engines can handle a variety of multimedia data. Google's Picasa launched the photo library function as early as 2005. Flickr launched a photo sharing service in 2004. YouTube began uploading videos in 2005, and Facebook added status updates to its profile in 2006. This is why we see Web 3.0 becoming more and more popular. As search technology evolves, so does the type of search performed. Before smart phones and tablets were widely adopted, most searches took place on desktops and laptops, but now we have turned to search from multiple sources and devices. Because these types of searches require complex algorithms and computing resources, the indexing process takes longer. However, as Web 3.0 becomes more and more popular, we expect that the time required to index and classify web pages will decrease. Differences between Web 3.0 indexes and Web 2.0 search engines Decentralized Web 3.0 is more decentralized than Web 2.0 search engines. Web. 2.0 uses hypertext transfer protocol to search for information, and its service is located in an accurate location. On the other hand, Web 3.0 uses index parameters to extract data from various Internet networks, which means that information is decentralized. In Web 2.0, power belongs to technical organizations such as Facebook and Google, and users need authorization to publish any content on the Internet, even if the data belongs to them. However, with Web 3.0, users can share information anywhere in the world through decentralized storage networks. Tim Berner Lee, the inventor of the World Wide Web, briefly interprets the semantics of Web 3.0 as an open, intelligent and autonomous Web. AI and Script Web 3,0 integrate AI (Artificial Intelligence) and ML to process information in the form of a technical brain. Its system will be built in for evaluation and integration using the Internet of Things. Data can be interpreted and stimulate everyday human activities. The Web 2.0 search engine uses JavaScript and CSS to make it more like Wikipedia. The algorithm and index of Web 3,0 are designed to enable users to link securely in a decentralized way. Transactions such as information and money are conducted in a point-to-point manner. Mediations and technical organizations are excluded because they are not important in Web 2.0. Web 3.0 integrates the Internet of Things with devices and various applications. These devices will take data from the environment and interpret it to make people's lives easier. For example, IoT (Internet of Things) is being used to build smart cities for smart roads, weather forecasting, and energy conservation like street lights turned off in the daytime. Advertising and Legal Web 3.0 will use behavioral advertising in Web 2.0 interactive advertising. Behavioral advertising is a method used by advertising organizations to display relevant information suitable for users. In the 2,0 search engine, interactive advertising means that you can get unwanted content. In addition, Web 3.0 is more personal than community-based Web 2.0 search engines. Web 2.0. It uses a set of community rules, and data has no copyright. Users in Web 3.0 can claim their copyright. For example, NFT is owned by the founder and has the right to sell at any time. Conclusion Elon Musk, founder of Space X, and Jack Dorsey, CEO of Twitter criticized Web 3.0 as a technology of the third world. Elon Musk said that Web 3.0 is vulnerable to network attacks and endangers human beings. Although it is clear that Web 3.0 indexes can play a leading role in how we find new content on the Internet, there are also some shortcomings. One such major disadvantage is that the web 3.0 index does not provide in-depth analysis of information, but only provides users with an overview of the content they want. In addition, this method is not easy for everyone to use because there are no intuitive navigation options available on its search page, such as those provided by old search engines such as Google and Yahoo. But despite all these shortcomings, people still trust the Web 3.0 index because it has advanced functions and results provided by new technologies such as AI (Artificial Intelligence). Many business owners prefer this method to traditional website analysis tools to improve their operational indicators, which is due to better insight into customer preferences.