A hashtag is the # symbol followed by a word or phrase — like #DigitalMarketing or #FoodLover. It categorizes your social media content and makes it searchable. When you post a cake photo on Instagram with #homemadecake, anyone searching that tag can find your post, even if they don't follow you.
Hashtags boost reach, attract new followers, and connect you with people interested in specific topics. But balance is key — overly generic tags like #love get buried in millions of posts, while ultra-unique tags that nobody searches for won't help either. The sweet spot is mixing popular, niche, and branded hashtags. On Instagram, 3-5 relevant hashtags tend to perform best.