Photo, video or carousel: what to post on Instagram

On Instagram, Reels work best for reaching new people, carousels for saves and detailed explanations, and photos for news and close-up product shots. Match the format to the post’s job and check it against your own stats.

What changed since “photos beat video”?

The first version of this article appeared before Reels existed, and its conclusion that video underperformed photos applied to the old feed. Reels launched in August 2020. Since then short vertical videos have gained their own tab and ranking rules, and they became the main way to reach people who do not follow you yet.

Instagram has since expanded its formats: carousels take up to 20 photos and videos, Reels can be up to 3 minutes long, and the profile grid switched to a 4:5 portrait layout. Trial Reels, shown first only to non-followers, let you test an idea without risking your main feed.

How does Instagram decide what to show?

In 2023 Instagram explained its ranking publicly. Each part of the app has its own algorithm.

• Feed. The system predicts whether someone will spend time on a post, comment, like, share it or tap through to the profile. If a person engages more with photos, they see more photos.
• Reels. The strongest signals are the likelihood of watching to the end, sending to a friend, liking and visiting the audio page.
• Stories. Shown first to people who regularly view and reply to your stories.
• Explore. Built for reaching unfamiliar audiences, with signals similar to Reels.

Low-resolution videos, watermarks from other apps, borders and silent clips get shown less.

Which format fits which task?

For a business, the combination usually wins. Reels bring new people to the profile, carousels and pinned posts explain the offer, and stories with a link send visitors to the website or DMs.

How do you make Reels people watch to the end?

• Put the hook in the first 2–3 seconds: a question, a result or an unusual shot.
• Shoot vertically in 9:16, in good quality, without other apps’ logos.
• Add captions; many people watch with the sound off.
• One clip, one idea. Split a long topic into a series.
• Use topic keywords in the caption; Instagram reads it for in-app search.

If filming in-house is not working out, a video team can help: video production for YouTube and social media often fits into a single shooting day.

Which post sizes should you use in 2026?

• Photos and carousels: 1080×1350 pixels (4:5). It fills more of the screen in the feed and fits the profile grid without cropping.
• Reels and Stories: 1080×1920 (9:16). Keep text and faces in the central area, since the interface covers the top and bottom.
• Reels cover: 1080×1920, while the profile grid shows the central 4:5 area. Check the preview before posting.

One visual template for covers and carousels saves the team time and makes the profile recognisable.

How do you test what works for your account?

Compare formats against one goal. Publish the same topic in two formats, say a carousel and a Reel, and after 7 days compare reach, saves, sends and profile visits in the professional dashboard. Repeat on 3–4 topics before drawing conclusions.

If the goal is leads, put a UTM-tagged link in your bio and check in GA4 how many enquiries came from Instagram. Your best organic posts are good candidates for Instagram ads, since they have already proven they get a response.

FAQ

Which is better on Instagram, photos or video?

For reaching new people, video in the Reels format. For explanations and saves, carousels. Photos suit news and close-up product shots. Check against your own account’s statistics.

How many photos can an Instagram carousel hold?

Up to 20 photos and videos in a single carousel post.

How long should Reels be?

Instagram allows Reels of up to 3 minutes. For reach, 15–60 second clips that get to the point immediately usually perform better.

Do hashtags affect reach?

Only slightly. Instagram relies more on user behaviour and caption text. Three to five precise topic hashtags are enough.

How often should a business post?

Consistency beats volume. For a small business, 2–3 posts a week plus stories on working days is realistic.

Sources

• Instagram: Instagram Ranking Explained (2023)
• Meta: Introducing Instagram Reels (2020)