The Unit 12 Review brings together two big areas: social media vocabulary and relative clauses. In today's connected world, knowing how to talk about what you do online is a real-life skill, and relative clauses help you write longer, smoother sentences — exactly what you need at B1.
Social media vocabulary — going beyond the basics
You probably already know post, like, share and follow. At B1 you can add more useful verbs: to upload (put a photo or video online), to comment (write a reply), to tag someone (link their name to a post), to mention someone (write @ + their name), to DM someone (send a private message), and to go viral (be shared by thousands of people very quickly). You'll also meet nouns like story (a photo or video that disappears after 24 hours), reel (a short video), hashtag (a word or phrase beginning with #), bio (the short description on your profile), notification (an alert that someone interacted with your content) and feed (the list of posts you see). Useful adjectives are trending (popular right now) and viral (shared very widely). A content creator or influencer is someone who makes posts as their job.
Relative clauses — the grammar review
Relative clauses give extra information about a noun, and they start with words like who, which, that, where and whose. There are two main types:
| Type |
Use |
Example |
| Defining |
essential information — no commas |
The influencer who lives in London has two million followers. |
| Non-defining |
extra information — use commas |
My sister, who is 25, works as a content creator. |
Quick rules for choosing the pronoun: who (or that) for people — The person who posted this is my friend; which (or that) for things — I love apps which let you edit photos; where for places — This is the café where we filmed our video; whose for possession — That's the creator whose videos always go viral. A common B1 mistake is using what instead of that or which: ❌ The video what I watched was funny → ✅ The video that I watched was funny. Another tip: in informal defining clauses you can often drop that — The person I follow is a chef.
Writing task
Write a short blog post (120–150 words) called "My life on social media". Describe which platforms you use, who you follow, and what kind of content you enjoy. Try to include at least three relative clauses.
Writing strategy: using relative clauses to add detail
Don't write short, choppy sentences like I follow Ana. She is a photographer. She is from Brazil. Instead, combine them: I follow Ana, who is a photographer from Brazil. This makes your writing sound much more natural and confident at B1 level. Remember: a non-defining relative clause needs commas; a defining clause does not.