Add overview description for CTI classification table - v2

crowdsec-docs/unversioned/cti_api/taxonomy/classifications.mdx

@@ -23,7 +23,19 @@ export const exclude = ["scanner:"]
 
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-This classification page provides a taxonomy of IP addresses that exhibit potentially suspicious behaviors. These classifications are designed to help you identify and respond to various threat actors and malicious activities.
+Classification of Threat Intelligence follows the format `*category:name*`, where category is a broad type of classification encapsulating different elements.
+A summary of the main classification category is provided below, and you can use the search bar in the table to filter the classification you are looking for.
+
+## Summary
+
+* `hosts_malware:*`: IP identified as hosting live payloads associated with known malware families.
+* `botnet:*`: IP associated with known botnets, based on the exploited CVE(s) and the payload they spread (e.g. Mirai).
+* `profile:*`: Describe the services publicly exposed by the machine (e.g. `profile:insecure_services`).
+* `ai-crawler:*`: AI company using to index the data used to train Large Language Models. Such companies (OpenAPI, ByteDance, Anthropic ... ) are heavy consumers of the internet bandwidth and result in a large amount of traffic. They can be directly consumed inside a specialized blocklist available [here](https://app.crowdsec.net/blocklists/67b3524151bbde7a12b60be0).
+* `ai-search:*`: AI search engine that is used by users to search the internet. They are coming from an AI agent, and are not used directly to train the AI models compared to the AI crawlers category. But the results is the same in terms of traffic load, as they can be part of an automation workflow. IPs can be directly consumed inside a specialized blocklist available [here](https://app.crowdsec.net/blocklists/67b3524151bbde7a12b60be0).
+* `device:*`: The IP is associated with a device having known security weaknesses.
+* `proxy:*`: Hosts identified as proxies based on the services they expose and/or their behaviour. IPs be directly consumed inside a specialized blocklist available [here](https://app.crowdsec.net/blocklists/65a56839ec04bcd4f51670be).
+* `group:*`: Cohort of machines seen attacking in a coordinated fashion. IPs belonging to the same cohort or cluster have been seen to exhibit a new behaviour in a synchronised manner, such as starting to exploit a known vulnerability at the same time (experimental feature).
 
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