Lesson 4 of 16 · Level 1: Beginner
Social Media Marketing for Business: Instagram, TikTok, Facebook and the Algorithm
- ⏱ 11 min read
- ❓ 4 review questions
- ✍️ Exercise with solution
In this lesson
- How to choose the right social platforms for your business instead of trying to be everywhere.
- How to optimize your profile so visitors become followers and customers.
- What the algorithms reward and how to structure a short video that holds attention.
- How to turn DMs and text messages into sales while respecting the TCPA.
- Which social metrics matter and how to calculate engagement rate.
Social media is where your audience spends a big part of every day. Used well, it gives you free reach, trust and sales. Used poorly, it eats hours with nothing to show for it. The key isn't being on every platform; it's being excellent on the two or three where your customers actually are, with content you can produce consistently.
Where Americans actually are
Pew Research Center surveyed 5,022 U.S. adults between February and June 2025 and asked which platforms they ever use. YouTube and Facebook still reach the broadest audience, while Instagram and TikTok skew younger:
Source: Pew Research Center, "Americans' Social Media Use 2025" (published November 2025). Overall reach is a starting point, not a decision: what matters is where your buyer persona spends time.
Which platform to choose
| Platform | Strength | Key formats | Great for |
|---|---|---|---|
| Visual, shopping, community | Reels, carousels, Stories | Products, food, fashion, beauty, local services, personal brands | |
| TikTok | Discovery: you can reach far even with few followers | Short vertical video, TikTok Shop | Brands with personality, quick education, products you can show in use |
| Broad, older audience; Groups, Marketplace, events | Groups, video, events | Local businesses, community organizations, 35+ audiences | |
| YouTube | A search engine of its own; videos keep getting views for years | Tutorials, reviews, Shorts | Education, products that need explaining, expertise |
| Professional context | Text posts, documents, articles, video | B2B services, consulting, recruiting, professional personal brands (lesson 16) | |
| Visual search and planning; pins last for months | Pins, idea boards, shoppable pins | Home decor, recipes, weddings, fashion, DIY |
To decide, cross three questions: Where does my persona spend time? Which format can I produce well and consistently? Which platform fits my product? Aurora Coffee picks Instagram (a visual product and a local community), TikTok (short brewing tutorials to reach new people) and email for repeat orders. It uses Facebook only for ads and skips LinkedIn for now, because it sells to consumers (it will revisit that in lesson 16 when it starts selling to offices).
A profile that converts
Your profile is your storefront. Someone who arrives from a video decides in seconds whether to follow, message you or leave. Check every item:
1. Which bio works best for a business profile?
It says what's offered, who it's for, gives proof and ends with a clear action. The others could describe any business.
How the algorithm works (no mystery)
Every platform decides what to show each person so they keep using the app. The details change often, but the principles are stable: they show more of what holds attention and sparks meaningful interactions. The signals that usually matter most:
Watch time and retention
How much of the video people watch, and whether they rewatch it.
Fix the first seconds before anything else.Saves and shares
Signals that the content is useful or worth showing to someone else.
Checklists, recipes and how-tos get saved.Comments and replies
Real conversation, not "nice 👏."
Ask a specific question at the end.Relevance
The topic matches what the person usually watches.
Stick to your pillars so the algorithm learns who you're for.Anatomy of a short video that holds attention
0–3 s HOOK: a promise or question that makes people stay.
"If your coffee tastes bitter, you're making this mistake."
3–25 s BODY: deliver fast, one step per shot, text on screen
(many people watch with the sound off).
25–30 s CLOSE: the result + a call to action.
"Save this and try it tomorrow. Full recipe at the link in bio."Every week, look at which pieces had the best retention, saves and shares. Make more of what works (same topic with a new angle, same structure with a new topic) and drop what doesn't.
Community: social media is a conversation
- Reply to comments and DMs quickly, especially in the first hour after you post.
- Ask questions, run polls and use question stickers in Stories.
- Share customers' content (with their permission): it's the best social proof there is.
- Handle criticism publicly with calm and solve it privately. A complaint handled well builds more trust than a hundred compliments.
2. Based on how algorithms work, which signal best shows that a piece of content is valuable?
Retention, saves and shares tell the platform the content deserves to be shown to more people.
Turning DMs and texts into sales
In the U.S., many sales that start on social media close in a private conversation: Instagram Direct, Facebook Messenger or a text message. A few tools make this manageable:
| Tool | What it does |
|---|---|
| Meta Business Suite inbox | Answers Instagram and Facebook messages from one place |
| Instant replies and away messages | Greet new conversations and set expectations after hours |
| Saved replies | Stored answers to frequent questions (shipping, grind size, returns) |
| Labels | Organize chats: new, order placed, paid, shipped, issue |
| Keyword automations | Someone comments or DMs "BREW" and automatically receives the guide link |
SMS marketing works, but it's tightly regulated. Under the Telephone Consumer Protection Act, marketing texts sent through a texting platform generally require the recipient's prior express written consent, such as an unchecked opt-in box or a keyword text-in with a clear disclosure ("Msg & data rates may apply. Reply STOP to opt out"). Since April 2025, FCC rules say people can revoke consent by any reasonable means, so honor STOP and similar replies. Send at reasonable hours (federal telemarketing rules use 8 a.m. to 9 p.m. in the recipient's time zone, and some states are stricter). Violations carry statutory damages of $500 per message, up to $1,500 if willful, so use a reputable SMS platform and keep consent records.
Social metrics that matter
| Metric | What it tells you |
|---|---|
| Reach and non-follower reach | Whether you're getting in front of new people |
| Retention or average watch time | Whether the content hooks people |
| Engagement rate (interactions ÷ reach) | Whether the content gets a response |
| Saves and shares | Whether it's useful or worth recommending |
| Link clicks and DMs received | Whether it creates purchase intent |
| Attributed sales (with UTM links, lesson 8) | Whether the platform brings in money |
Example: one of Aurora's reels reached 8,000 people and got 320 interactions (likes, comments, saves and shares). Its engagement rate is 320 ÷ 8,000 = 4%. Another reel reached 12,000 people but got only 240 interactions, a 2% rate: it traveled further but resonated less. Look at both numbers together.
3. A post reached 5,000 people and received 150 interactions. What's its engagement rate by reach?
150 ÷ 5,000 = 0.03 = 3%.
4. You want to send promotional texts to customers. What do you need first?
Having someone's number isn't permission. Marketing texts generally require written consent under the TCPA, and every message should explain how to stop receiving them.
Practice exercise: social media audit and plan
- Choose no more than three platforms and justify each one with the three questions from this lesson.
- Rewrite your bio with the formula and define four Story highlights.
- Script a 30-second video with a hook, a body and a close.
- Set up instant replies and five saved replies for your most common questions.
See solution: a sample script for a hair salon in Atlanta
HOOK (0–3 s): "Stop washing your hair like this if it's color-treated."
BODY (3–25 s):
Shot 1: very hot water → "Hot water opens the cuticle and your
color fades faster."
Shot 2: regular shampoo → "Switch to a sulfate-free shampoo."
Shot 3: rubbing with a towel → "Blot dry. Don't rub."
CLOSE (25–30 s): glossy color result + "Save this. Need a color
refresh? Book in the link in our bio."Platform choice: Instagram (visual results and local clients), TikTok (hair tips travel far) and Google Business Profile for local searches (lesson 13). Bio: "Color & cuts in Midtown Atlanta ✂️ Lived-in color specialists · 4.9★ on Google · Book below 👇". Highlights: Prices, Before & After, Reviews, Aftercare.
Summary
- Choose two or three platforms based on your customer, your product and what you can produce consistently.
- Optimize your profile: a clear bio, a useful link and highlights that answer common questions.
- Algorithms reward retention, saves, shares and real conversation; hook people in the first three seconds.
- Close sales in DMs with saved replies and labels, and follow the TCPA before sending marketing texts.
- Measure non-follower reach, retention, engagement rate and sales, not just followers.
You've finished Level 1! Next lesson: SEO: How to Rank Your Website on Google, Step by Step. Level 2 starts with how to show up on Google when your customer searches for what you sell.
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