TAGGING OTHER ACCOUNTS ON YOUR POSTS
Tagging an account directly onto your post can only be done if the post is a picture. You can tag up to 20 accounts. I do this with every single picture, simply because the account would have to go and check the picture out in order for the notification to go away.
Yes, it can be a bit annoying, but it has been one of the only ways I have gotten some of my posts reposted by 4M-15M accounts without spending a single dollar. Can you imagine what happens if a 15 million follower account reposts your picture and tags you in it? Because of reposts by huge accounts, I was recently able to gain 3000 followers in a mere 10-day stretch.
Tagging these accounts on my pictures was the reason my posts were noticed in the first place. So far, I haven’t annoyed anyone so much that they would block me, so this strategy has worked out for me quite well.
Do not confuse tagging accounts on your picture with tagging accounts in your caption. If an account is huge, tagging them in your caption will go unnoticed. A-1 million-follower account gets 100 notifications in a matter of seconds. If one of those notifications was you tagging them in the caption of your post, it will never be seen or noticed.
Tagging huge accounts directly onto your pictures, increases the chances of you getting noticed and perhaps may even result in a repost.