What's the difference with 'which' and 'such as'?

if we use which are the list that i'm going to give you is 100 certain if we use such as it's more just an example that's the difference which are certain such as example

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Ajarn Ken Learn English

Ajarn Ken is a native English speaker from Scotland in the UK and has been teaching English since the year 2008. Most recently Ken has been teaching, coaching and mentoring university graduates in Bangkok, Thailand to prepare them to successfully pass interviews to be Cabin Crew and Flight Attendants with airlines all over the world

Ajarn Ken

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