Final answer:
A blog is an online diary where authors share ideas, while a wiki allows multiple users to collaboratively create and modify content.
Step-by-step explanation:
A blog is an online diary where authors post information, including ideas and opinions. Blogs can allow feedback from readers and provide hyperlinks to other online content. They are accessible to anyone and can incorporate multimodal content such as text, images, and videos.
On the other hand, a wiki is a website that allows multiple users to collaboratively create and modify content. While a blog is typically authored by a single person or a group, a wiki allows anyone to contribute and edit the content. This collaborative nature makes wikis a great tool for collective knowledge creation.
In summary, the main difference between a wiki and a blog is that a blog is primarily used for personal expression and sharing ideas from one or a few authors, while a wiki enables the collective creation and modification of content by multiple users.