Just to clarify, you do not have to include a call to action in every Instagram post you make. But keep in mind that the text box of your publications is an excellent way to achieve engagement.
You can, for example, invite your followers to visit your website. Also buy a product, answer a question, tag other users in your post, among others.
Do not reserve your call to action for the end of your text box. It is important to put the most important information at the beginning of your text. This is because after 3 or 4 lines of text, this is not visible unless the post is opened.
Make the first part of the text of your post super interesting. This way your followers will want to continue reading your post.
The Emojis are also a great way to get attention and make followers notice that there is a new call to action in your post.
How to make a Call to Action
To create a call to action on Instagram, you need to ask your followers to do something after reading your text.
You can ask simple things. For example, ask what they will do on the weekend, or what they think of a specific product. Ideally, in this case, ask them to leave a response in the comments.
You can also ask your followers to watch your new blog, video or promotion. For this you must include the link of your page or blog in your Bio.
Another option is to simply ask them to tag their friends in the comments. This is especially effective if you stimulate them with an Instagram contest.
You can also add mentions in your Instagram text, in this way you facilitate the feedback process because you are taking the first step.