Of course, you can use the work of others, but then it is essential that you acknowledge the source and indicate the author. The copied text should be indicated with inverted commas and the name of the person who wrote/said it. You should also give the URL address of the website you are using. Artificial Intelligence (e.g. generative AI like ChatGPT) is now very fashionable. It creates full statements on a given topic. You can use it, but if you are quoting text taken from a GPT chat you should cite and give the source. You can also paraphrase the generated text. Change sentences, add words, select some elements. Then your text will be inspired and not created by Chat GPT.