Simply, Wiki is a website. Website is a collection of web pages.
You can create/edit HTML pages online using browsers. Wiki website is
useful for collaborating with others. For example, Team Members,
Students, Family, Friends and Community Members. It is also known as
editable website.
Zoho Wiki is a free online tool to create collaborative web
portals. So, No download, No installation, No special IT
infrastructure, No need for IT experts, No need for Webmaster. You can
access your wiki anywhere, anytime, if you have internet connection.
For e.g http://zohowikihelp.wiki.zoho.com/Wiki.html
In case of a private wiki, it is mandatory that your friends have a Zoho account to access your wiki. So your friends would have to sign up first before they can access your wiki.
I sent me this link https://wiki.solutions-tcc.com/StrEngOn1/Lecture---1---Recorded---Videos.html and ask me access decline
why? What is a problem?