Great Question, @gpatel-fr !
I will answer that one by one but I will explain the value it will add briefly with my personal experience →
My college uses google meet for classroom discussion and in every class, all the important messages in the chatbox get lost when the chat is active. to recover the buried gold someone has to scroll all the way back and copy paste those messages in to the chat AGAIN which is a huge waste of time and effort.
This process continues numerous times in a single meet when the chat is active and the message gets buried again and if someone need to refer that notice again the cycle continues.
This is a very troublesome problem for both the educator and students alike. For educators because their important messages get buried and they have to repeat themselves over and over again and for students because they have to scroll and search for the relevant info in the chatbox !
It becomes quite frustrating over the long run and so a pinned chat feature will solve this problem quite well… all the important chats will be pinned by the moderator where others can quickly glance up and refer to the important points of the meet so everyone is on the same page.
Thus if implemented in jitsi it would not only result in more educational meets but also professional meets / work-related meets in general taking place on jitsi.
Use Cases for the end users → Let’s say I am in a jitsi meet with 10- 20 participants who are active on the chat box.
Now if the purpose of the meet is discussion of college assignments or workflow for group projects, getting acquainted with a new community whose members are using JITSI for RTC so on and so forth, it is necessary that certain important instructions/ messages do not get lost in the bucket load of chats and all the users can refer them quickly.
Even if a small minority of participants are very active on the chat the important points of the meet may get lost.
For college assignments, it would be important to quicky refer to certain notes to maximise the efficiency of the meet for example → agenda of the meet, what will be discussed , sub topics of the assignment etc which have already been discussed in the meet etc . each of these can be one message that would be pinned in the pinned chat where all the participants can quickly glance at and refer to very quickly.
For educators and students , here the important points of a topic, external doc links, answers to common questions in that meet, schedule/syllabus for tests can be pinned on the chat after only writing that once , which the students can refer to at anytime.
For workflow discussion meet for a group project Here the pinned chat feature can be used as a sticky note where the roles of the members, the component being discussed, phases of the project can be defined and pinned, again easier for the group leader to make sure everyone is on the same page to increase the meets efficiency.
For meets for getting acquainted with a community or club messages like the contact information of the inductors can be put on chat and pinned so that the inductees can refer to them at any time.
If this conversation was in a meet, all the above mentioned points could have been separate messages and pinned so that we could have a more detailed discussion about each use case.