Hey there Liam!
Adam here from Shopify.
If I understand correctly, you are looking for an excerpt to show for your posts on your blog page.
To do so, you should be able to add an excerpt for each post, and copy and paste the first 3 lines, or whatever else you wanted to say.
It will then only show that, and then a "read more" link underneath in most cases.
This can differ from theme to theme of course.
Here is where you can locate the "Add Excerpt" option:
Let me know if that works for you or not.
Have an awesom day and we'll chat soon :)
Adam B | Shopify Guru
|9 seconds ago|