Vome Achievements are a four-tier badge ladder: Bronze, Silver, Gold and Platinum.
You climb it by completing challenges, which award Vome Points (VP). Every volunteer can earn them, on every plan, and they follow you across everything you do on Vome rather than belonging to one organization.
By completing challenges. Challenges are built around activity milestones, such as completing a certain number of shifts or logging a certain number of hours.
Different challenges are worth different amounts, and your Achievements page shows what each one is worth before you complete it.
On your Achievements page. It shows the badge you currently hold, the points you have earned, the challenges still available to you, and how many VP remain until the next badge.
Almost always because the hours have not been logged with the organization yet.
Turning up is not what counts. The hours have to be recorded, either by checking in and out on the day or by claiming them afterwards. If neither happened, there is nothing for the challenge to count.
If you are not sure how to log hours you have already worked, see How do I claim hours for a past shift?
No, and they are easy to confuse. They are two separate things:
For the second kind, see Understanding your awards on Vome.
Open your Achievements page and send them a screenshot of it. There is no formal export, and a screenshot is what organizations asking this question normally want.
Yes. Plenty of people post them, and you are welcome to tag Vome when you do.