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Social media call to action examples: what to ask for, network by network

Most posts end the way they began: with nothing asked. A call to action is the one line that tells someone what to do next, and it only works if that thing can be done where they are reading. A link in an Instagram caption cannot be tapped; a link on a Pin is the whole point of the Pin. This is a list of calls to action by goal, the networks where each one works, and how to give every network its own last line without writing the post seven times.

Rodolfo Mota

Rodolfo MotaFounder of SPREVA

The short version

Ask for one thing, and make it the thing the network makes easy. On Instagram and TikTok, ask for a save, a share, a comment or a visit to your profile, because links in captions cannot be tapped. On Facebook, LinkedIn, X, Threads, Bluesky and Pinterest, put the link in the post and say what is behind it. On Google Business Profile, the link becomes a button. Write the post once, then let each network end with its own line.

Choose the goal first

Each call to action asks for one of six things. Pick the one this post is for:

GoalExampleWorks best on
A saveSave this for your next trip.Instagram, Pinterest
A shareSend this to the friend who always orders the same thing.Instagram, TikTok, Facebook
A commentLeft or right: which one would you pick?Every network
A clickThe full recipe, with the quantities, is here:Facebook, LinkedIn, X, Threads, Bluesky, Pinterest
A visit to your profileThe link to book is in our bio.Instagram, TikTok
A followFollow so you see part two tomorrow.TikTok, Instagram, YouTube

A call to action that sends people to a link fails on the networks where the link is only text:

NetworkCan a link be tapped?What to ask for
InstagramNot in captions or comments. In a Story, only through a link sticker added in the appA save, a share, or a visit to the link in your bio
TikTokNot in captionsA comment, a follow, or a visit to your profile
YouTubeIn a long video's description. Not in a Short's description or commentsIn a Short, say where to find the link; in a long video, put it in the description
FacebookYes. With no photo or video, it becomes a previewA click, saying what is behind the link
LinkedInYes. With no picture, it becomes a preview cardA click or a comment
XYes. Any link counts as 23 charactersA click, a reply or a repost
Threads and BlueskyYes, in the post. On Threads, in the first reply tooA reply, or a click
PinterestYes. Every Pin opens its linkA save and a click, with the title saying what they will find
Google Business ProfileYes, as a Learn more buttonA visit, a booking, a call

Five rules for the last line

A good call to action is short, specific and possible:

  • One ask per post. “Like, comment, share and follow” is four asks, and people do none of them.
  • Say what they get. “The full recipe, with the quantities” does better than “Link below”.
  • Make it easy to answer. A question with two answers gets more comments than “What do you think?”.
  • Match the post. Ask for a save on a tip, a share on something funny, a click on something they need now.
  • Do not bait. Facebook says it shows fewer people posts that only ask for likes, comments or shares, such as “Comment YES if you agree”.

Calls to action to copy

Change the words to your own, and keep the shape:

  • For a save: “Save this for the next time you are stuck.” “Keep this list for Friday.”
  • For a share: “Send this to someone who needs it today.” “Tag the friend you would bring.”
  • For a comment: “Which would you choose, A or B?” “What should we make next?”
  • For a click: “The whole guide, step by step, is here.” “Sizes and prices are on the page.”
  • For a visit or a booking: “Book Saturday from the link in our bio.” “Call us, or book with the button below.”
  • For a follow: “Part two goes up tomorrow.” “One tip like this every Monday.”

One post, a different last line on each network

  1. 1

    Set how each network closes, once. In Settings, open Writing styles and give each network its own line under How to close, such as “Ask for a save” for Instagram, and anything to leave out under Avoid, such as “Links in the caption”.

  2. 2

    Write the post once, and put the link in the Link field. SPREVA attaches it on the networks that take a link in the post, and leaves it out on Instagram, TikTok and YouTube. On YouTube, write the link into a long video's description yourself.

  3. 3

    Press Adapt to each network and read the last line in each tab: each version follows that network's style, and you can change any of them before it goes out.

  4. 4

    On Threads, use the First comment for the link or the details, so the post itself can stay short.

  5. 5

    On Google Business Profile, the link becomes a Learn more button, so the text only has to say what is behind it.

The preview of a Bluesky post in SPREVA, with its text and a photo of coffee beans.
Each network's version, previewed before it goes out

See which ending works

Put the posts with one kind of ending in a campaign, and the posts with another in a second one. In Analytics, filter by one campaign and then by the other over the same weeks, and compare the comments and the shares, and the clicks on the networks that report them, such as X and Pinterest. Social media metrics that matter, and where to find them.

Write this week's endings now

Open your writing styles, give Instagram, TikTok and LinkedIn each their own way to close, and adapt your next post to see the difference. Every plan starts with a 7-day trial. How to set the tone for each social network once, and let every post follow it.

Questions

Does every post need a call to action?

No. A post that only entertains or informs can end on its last good sentence. Ask for something when there is a clear next step.

Where do I put a link on Instagram?

In your bio, and say so in the caption. Links in Instagram captions and comments cannot be tapped.

Can a scheduled Instagram Story have a link?

Not as a sticker: Instagram does not let apps add one. For a Story with a link to tap, post it from the Instagram app.

Is “comment below” engagement bait?

Not when the question is real. Bait is a comment asked for its own sake, such as “Comment YES”; a question people want to answer is a conversation.

Can I use the same call to action everywhere?

Only when it works everywhere, such as a question. A line that sends people to a link needs a different ending on Instagram and TikTok.

Written by

Rodolfo Mota

Rodolfo Mota

Founder of SPREVA

Makes SPREVA in Portugal: the Studio, the tools an agent works with, and the publishing behind them.

From your next idea to a published video.