What are content pillars for social media, and how do you choose them?

Short answer

Content pillars are the few recurring themes your posts keep coming back to, so every slot in a calendar has a reason. The networks don’t use the term, but their creator guidance says the same things: plan a mix, post on a schedule you can keep, test formats, and let your own insights show what to repeat. Three to five pillars, each tied to a question your audience asks, is a working range of ours, not a network’s rule.

Written by the Mellow team · Updated October 10, 2026, sources read October 10, 2026

What the networks say

None of the four networks below uses the phrase “content pillars” in the pages we read on 10 October 2026. What they publish is advice that adds up to the same practice:

Network	What it recommends	Source
YouTube	Keep a content plan, so the channel stays active and has room for new ideas; set an upload schedule that is right for you; mix timely topics with long-lasting videos; test a new series or format; use analytics to double down on what works.	YouTube for Creators
Instagram	Decide how often you will post and what kind of content, then plot it out and track it; use Insights to find the type of content to share more of; diversify content to engage the audience on more than one level; use drafts to make content in batches.	Save time creating, Create engaging content
TikTok	Post consistently and keep to a content schedule, without having to post daily; learn which content formats work for your audience; turn a post that does well into a series; test and learn.	TikTok for Business
LinkedIn	Set an engagement target, give members something of value, post at a steady pace, mix your own content with other people’s, and use Page analytics to offer more of what works. LinkedIn’s Marketing team wrote this in August 2020.	LinkedIn Marketing blog

The common thread is a plan with variety in it, kept to a schedule, and revised from your own results. A pillar is that plan’s unit.

Choosing pillars: a method

This is our method. The networks don’t prescribe it.

Start from questions, not topics. List what people ask you, or what you would want a new customer or reader to know. Each question is a post waiting to be made.
Group them into three to five themes. If a group can’t be told apart from another, merge them. If you can’t name five posts for a theme, it is not yet a pillar.
Give each pillar a name, a question and a format. “Repotting: how do I look after what I bought? Carousels and short videos.” A pillar with no format is a wish.
Check the balance. LinkedIn’s 2020 advice for Pages is a 4-1-1 mix: for each piece about your brand, one update from another source and four pieces from others. You may weigh yours differently, but weigh it once and write it down.
Put a pillar on every calendar slot. A post that fits no pillar doesn’t get a slot until you decide whether it is a new pillar or a one-off.

An example, with invented values

A small plant shop, planning for three networks. Everything here is made up to show the shape; it is not a recommended mix or frequency.

Pillar	The question it answers	Formats	An example post
Care	How do I keep this alive?	Carousel, short video	“Repotting a root-bound plant in four steps”
Choosing	Which plant suits my room?	Photo post, Story	“Three plants for a north-facing window”
Behind the shop	Who is behind this and how is it made?	Short video	“Unpacking this week’s delivery”
Customers	What did people do with theirs?	Photo post	“A customer’s kitchen shelf, after”

Using pillars in the calendar

In the calendar, give every row a pillar column and look at the month as a whole. A pillar that never appears is a decision to drop it, made by accident. Review the pillars against your own numbers, with the network’s analytics: Instagram’s guidance points to Insights, including reach from people who don’t follow you (how to see them); YouTube’s to YouTube Studio analytics (how to see them). Keep a pillar that earns what you need from it, change its format if the idea is right and the format wrong, and drop one that doesn’t.

The content calendar guide shows the whole sheet, and the calendar template is one you can copy.

What nobody has published

No network publishes how many pillars to have, or that having them raises reach. The pages above recommend planning, variety and following your results; the number and the names are your decision. The TikTok page’s example of a series that grew out of one successful behind-the-scenes video is the network’s own account of one business, not a measurement.

Where Mellow Hub fits

Mellow Hub has no pillar field: keep the pillar in your calendar. Hub starts when a post is written: one composer for every network it publishes to, a caption of its own for any network, a check of each network’s rules before sending, and a time to publish. Where a network needs a different file, make a separate post for it, so one idea doesn’t go out pasted unchanged.

Hub is paid: plans start at $19 a month (Solo), after a 7-day trial with a card on file that costs nothing if you cancel before it ends, and a monthly plan's first month is 20% off. Publishing is unlimited on every plan, under a fair-use ceiling that stops automated floods (900 publications a month on Solo). One publication is one post on one account, so a post sent to five networks counts as five. There are no automatic overage charges.

Questions people also ask

How many content pillars should I have?

No network says. Three to five is a working range of ours: fewer than three leaves a calendar repeating itself, and more than five spreads a small account thin. Choose the number you can keep making posts for.

Are content pillars the same as hashtags?

No. A pillar is a theme you choose to post about, and it exists in your plan. A hashtag is a label on one post. One pillar may use several hashtags, and Instagram allows only five per post.

Should every network get the same pillars?

Usually the same themes, in a format that suits each network: a carousel on Instagram, a series on YouTube, a document on LinkedIn. The audience on each network may not be the same, so check each network’s own analytics.

How do I know whether a pillar is working?

Look at the network’s own analytics across several posts on the pillar, not one. Instagram’s advice is to use Insights to see which content reaches more people, including non-followers; YouTube’s is to follow what your analytics in YouTube Studio show; TikTok’s is to test and learn.

How often should I post on each pillar?

The networks give no ratio. Spread them so none vanishes for weeks, then adjust from your results. LinkedIn’s Marketing team described a 4-1-1 mix for Pages in 2020, which is one team’s rule of thumb.

Sources

Other companies’ features change. Every statement about them rests on these pages, as they read on the date above.