The Request Verification feature exists to allow people to trust that someone is who they claim to be (that your real name is being used, or a name that links to you other online accounts) by having a small blue checkmark appear next to the name. Documents will likely not be needed but we are not able at this time to provide a list of verification requirements and will reach out to people as needed.
You can ignore the letter combinations shown in that screenshot, they refere only to HTML code being used in the post.
There is a “Cart” icon that relates to purchases, currently only relating to Courses.
We will make the website (and apps) faster and faster over time.