Write the caption before the tags
A hashtag is a label for the topic. It does not replace a caption that says what the post is. If you cannot describe the post without tags, the caption is the thing to fix. The caption and hashtag generator drafts that sentence from your own words and builds hashtags only from those words. The content calendar is where that sentence should exist before you open Instagram.
Use a few tags that a person would search
Pick tags that name the subject, the format, and the kind of viewer, in words you would actually say. A cooking post can use the dish and the method. It does not need a list of unrelated tags copied from another account. Those tags attract people who did not want the post, and they teach you nothing when you look back.
Instagram has changed how many hashtags a caption or comment can hold, and it has treated a large block of tags as less useful than it used to. Check the current limit in the app before you publish. This guide will not invent a number that the app may already have changed.
Do not hide a tag dump
Putting thirty tags in a comment, or in a line of dots under the caption, is the same block. If you would be embarrassed to read the tags out loud, delete them. Three to five that match the post are enough to test. If you want more, add one new relevant tag on the next post and see whether that post is the one your own followers save.
YouTube has a separate, documented hashtag rule: above 60 hashtags on a video, YouTube ignores all of them, and more than 15 can look spammy. That rule is not Instagram's. Do not copy it across.
Judge the post, not the tag
Saves, replies, and whether the right people found the post matter more than how many tags you attached. Log the post in the Instagram posting planner if you want a record. Paid Creator Climb plans do not schedule Instagram or score hashtags. They audit YouTube metadata.
Questions
How many Instagram hashtags should I use?
A few that name the post. Check Instagram's current limit in the app, because it has changed. A copied block of unrelated tags is not a strategy.
Should I put hashtags in the caption or a comment?
Put them where you can stand to read them. Moving a long list into the first comment does not make the list more relevant.
Do YouTube hashtag limits apply on Instagram?
No. YouTube ignores every hashtag on a video above 60. Instagram's limit is whatever the app currently enforces. Treat them as different products.