For each post you can use up to 30 hashtags although it would be more appropriate to choose only the most relevant ones
Photos and brief text are allowed
Remember to share high-resolution photos and create useful and visually appealing contents that will make users to follow your profile
Instagram uses Handle @
Handles are unique user name mainly used to identify a person or a project’s account.
They always starts with the @ symbol, followed by a name or phrase to identify the account.
They are used to send a direct reply to someone, by starting your message with their handle.
Useful to link to someone else’s account (known as a ‘mention’) by using their handle elsewhere in your post. This will link your post to the mentioned user’s account.