Just to be clear, you are currently on Community Central. If you are talking about a different "here", then please specify which "here" you are talking about. Each wiki has its own policy about advertising other wikis. Some don't care at all and other absolutely forbid it. So you will need to check each wiki's policy.
According to the last reply from local admins I read about this, the answer (for Community Central) is that it depends on the quality of your advertisement. If it is something as simple as "I just created a wiki! Please join!", then no. However, if you give more details and describe the wiki, then they will generally allow it. For example, what is the topic? If there are similar wikis, how is yours different? Are there specific tasks the wiki is trying to accomplish such as completing character pages?
If you description is really long or requires more advanced formatting than offered by Discussions, you can create a draft blog post as a subpage of your user page. One you believe the draft is ready for "publication", you can contact one of the local admins. They will review the draft and, if they agree that it is acceptable, convert it into a blog post. Users use to be able to directly create blog posts but that was stopped due to the number of blog posts with insufficient information. Hence the new review process.
Using gallery tags would be better. They are treated the same but gallery tags are simpler. As for the odd behavior, could you link to an example where this is happening?
Is the second image while logged into a different account or while logged out? Either way, the navigation bar is cached which means it doesn't update right away. Logged-in users get updated faster so that could be the reason. Either way, the "issue" can be fixed by purging the affected page.
Just like when you edit any other page, at the bottom should be a place to write an edit summary, mark the edit as minor, preview the change, save the change, etc. There should be a checkbox there for comments.
As Caburum said, you cannot "redirect" contributions to a different account. However, what you can do it edit the old account's user pages (must be done on each wiki) or global profile to clearly indicate that you have moved to a new account and which account that is.
Be sure to clearly indicate which one is the copy. Otherwise, they might close the wrong one.
If you block them yourself, make sure the "Automatically block the last IP address used by this user, and any subsequent IP addresses they try to edit from" option is checked; it should be by default. There is also the option "Prevent logged-in users from editing from this IP address" which should be checked if you can but it looks like Fandom has hidden it for now. I am not sure why they keep hiding and unhiding it.
Wiki managers (now called wiki representatives) are not there to do the work for your or promote your wiki. They are there to help if you need it but you are expected to take the lead on the wiki's development. That said, there are certain criteria the wiki needs to meet in order to be considered for receiving a wiki manager. You can read more about it (as well as how to request one) here.
Just to provide an explicit answer for the second question, it looks like it can't be done in visual mode. At least, not yet. Fandom might add that in the future.
It is possible that Fandom might allow users to see older badges if and when they update the feature. That is how it worked on the old platform. However, for now, you cannot.
If the sections are short enough, using headers as TreeIsLife suggested would be better. If the sections are long, you should consider making them their own pages and just linking to the pages on the main help page.
It can take several business days to get a response. It is currently the weekend. The first business day (day 1) won't be until Monday.
If you are an admin (maybe content mods too), you can use Special:DeletedContributions/Username or you can just view Special:Log/delete/Username to see what they have deleted. To be clear, the two show different things but in this case they both show what you want. The first shows contributions the user made that have been deleted regardless of who deleted it. The second shows things the user has deleted regardless of who created/edited it. Since, in this case, the user both contributed and deleted the content, it will show on both pages.
To clarify, the summary is auto-filled when empty only for obvious situations like creating a page or removing all of the content. It will not auto-fill for something like correcting a link. To add an edit summary for something like that, there should be an edit summary field above the save button.
Does the avatar still not match in that thread? It could be a bug similar to the blog bug.
Cabbage Man Fan, you are missing the / from your closing tag. It is likely that Official Cumulus Cloud is working with a portable infobox but we don't know unless they confirm that.
Is your example from the Disney Wiki the exact text you tried? From what I can tell, there is no such article on that wiki. You cannot just create random tags. The tag has to be an existing article.
Edit: Never mind that question. I think I found the page you meant. What other pages can you not tag? At least for the example you already gave, the title is less than 4 characters long. It looks like the Discussions tag search uses the same results/algorithm as the search in the global navigation bar. That search was recently changed (see this thread) to require 4 characters or more in order to return suggestions. So this issue seems related to that.
For future reference, global blocks are usually for ToU violations and/or interwiki vandalism/spam. So unless you have reason to suspect that the user is vandalizing multiple wikis, the quickest solution is to just block them locally. That can be done by any local admin. In the even that you do have evidence the user may be vandalizing multiple wikis, try reporting them to SOAP first. Generally, SOAP will respond quicker than staff since staff could take several business days. SOAP is a volunteer force of users who handle severe and interwiki vandalism/spam and they can also block users globally.
Oh. iPad has had a long history of avatar upload issues. If you can, try a different device.
I am not sure how many you tried to post but at least one of them came through. The size is definitely not the issue. What device and browser are you using when you try to upload it? Also, do you know what the image's name is on the device?
If I may, I would suggest uploading a square portion of the image. As you can see, avatars are displayed as circles (on the old platform, as squares). As such, your image might get squished if the original shape is not a square. Also, I assume you want to focus on the character's face. As it is currently near the corner of the image, there is a change it may get cropped out a bit when the avatar is displayed.
Edit: Indeed, it looks like your current avatar got a little squished as well.
Edit: Just checked. The face remains within the circle but just barely. It still gets squished a bit but I guess at that size you can't really tell the difference.