Terrorist organizations use the Internet to spread extremist ideas and recruit mainly through the following means: **Propaganda**: - **Building websites and platforms**: Establishing special terrorist websites, social media groups, dark web forums, etc., posting content on them that promotes terrorist ideas, bloody and violent scenes, so-called "jihad" achievements, etc., to attract the attention of people with extremist tendencies. - **Producing and disseminating video and audio**: Producing terrorist attack videos, extremist sermon audio, bloody pictures and other multimedia materials, and widely disseminating them through the Internet to show their "power" and inspire others to follow suit. - **Using hot topics and tags**: With the help of current hot topics and popular tags on the Internet, cleverly integrating extreme ideas, so that more people can see them in a large amount of information and expand the scope of influence. **Recruitment**: - **Anonymous identity communication**: Communicating with potential recruits anonymously or in disguise on the Internet, avoiding real supervision, promoting the "ideals" and "goals" of terrorist organizations, advocating the "glory" after joining, etc., to seduce others to join. - **Precisely locate the target population**: Through big data analysis and other means, target those who are dissatisfied with society, in psychological difficulties, seeking excitement or have specific ideological tendencies, and push extreme ideological content in a targeted manner to induce them. - **Organize online training**: Provide terrorist activity skill training tutorials, action plan guidance, etc. on the Internet, teach how to make improvised explosive devices, carry out attacks, etc., further pushing people into the abyss of terrorism.