What Is a Hashtag?
A hashtag is a metadata tag formed by placing the hash symbol (#) directly before a word or phrase, with no spaces.
When posted on a social media platform, the tagged text becomes a clickable link that leads to a feed of all other public posts using the same hashtag.
Platforms including Instagram, X (formerly Twitter), TikTok, LinkedIn, and Facebook all support hashtags, though they function differently and carry different weight on each network.
The purpose of a hashtag is categorisation and discovery. Without hashtags, your content is only visible to your existing followers and to people who stumble across it through algorithmic recommendations.
With relevant hashtags, your content enters curated feeds that users actively browse, and it appears in search results for those topics. This is one of the key mechanisms through which organic reach can extend beyond your base audience at no cost.
Hashtags were first popularised on Twitter in 2007 and have since become a standard feature across virtually every major social platform. Their value varies significantly by platform. On Instagram and TikTok, hashtags remain a meaningful discovery tool, particularly for niche content.
On LinkedIn, a small number of professional hashtags adds context to posts. On Facebook, their impact is more limited. Understanding where hashtags work best is as important as knowing which ones to use.
There are several categories of hashtag used in social media marketing. Broad or trending hashtags such as #Marketing or #SouthAfrica have massive audiences but also extremely high competition, making it unlikely that any individual post will stand out. Niche or community hashtags such as #JohannesburgFoodie or #PretoriaBusiness attract smaller but more targeted and engaged audiences. Branded hashtags are created by businesses for their own campaigns or community, such as #Juicy Designs or a campaign-specific tag. Location hashtags such as #CapeTown, #Sandton, or #GautengBusiness help South African businesses connect with geographically relevant audiences.
Effective hashtag strategy balances these categories. A single post might combine one or two broad hashtags for maximum exposure potential, three or four niche hashtags for targeted community reach, and a branded hashtag to build a trackable content archive.
The total number of hashtags used per post should match the platform's culture and algorithmic preferences, which change over time as platforms update their recommendations.
Hashtags In Practice
The scenarios below are illustrative examples, not Juicy Designs client results. The figures indicate the scale of effect that hashtag work typically produces, so treat them as indicative rather than measured.
Picture a Cape Town-based interior design studio that wants to grow its Instagram presence and attract followers who are renovating homes in the Western Cape.
Rather than using generic hashtags such as #InteriorDesign (which has hundreds of millions of posts globally), the studio would build a layered hashtag strategy.
Each post would include one or two broad hashtags for discovery potential, four niche hashtags specific to South African interior design and home renovation communities, and one location-specific hashtag such as #CapeTownInteriors or #WesternCapeHomes.
It would also use its own branded hashtag, encouraging clients to tag their renovated spaces with it to build a community of authentic content.
Over three months, the studio could track which hashtag combinations drive the most profile visits and follows from accounts located in South Africa. It would typically find that niche, location-specific hashtags outperform broad ones for audience quality, even though the raw reach numbers are lower.
This aligns with the broader principle that reach without relevance is a vanity metric: 500 profile visits from genuinely interested local users is worth more than 5,000 visits from accounts in unrelated countries.
On TikTok, South African small businesses such as food vendors in Johannesburg, clothing boutiques in Durban, and service providers across Gauteng can find meaningful growth by pairing local hashtags with trending sounds and formats.
Imagine a Johannesburg braai equipment supplier using #BraaiLife, #SouthAfricanBraai, and #Jozi alongside a trending audio clip during Heritage Month. A video of that kind could plausibly reach something in the region of 180,000 views, the vast majority from South African accounts, and drive a noticeable spike in online store traffic for a week or two afterwards.
For B2B brands on LinkedIn, hashtag strategy requires a different approach.
Consider a Sandton-based financial services firm that uses three to four professional hashtags per post: one sector-specific tag such as #FinancialPlanning, one broader professional tag such as #BusinessSouthAfrica, and one event or trend tag when topically relevant.
Overusing hashtags on LinkedIn can signal low quality, so restraint and relevance are more important than volume.
Monitoring hashtag performance is also valuable for sentiment analysis. Brands can track their branded hashtag and relevant industry hashtags to see how people are discussing their products, competitors, or industry trends. This transforms the hashtag from a one-directional broadcast tool into a listening channel, giving South African marketers insight into what their target audience genuinely cares about.
One practical consideration for South African brands is the mix of English and local language hashtags. South Africa has 11 official languages and a rich culture of code-switching on social media.
For brands with diverse target audiences, testing hashtags in isiZulu, Afrikaans, or Sesotho alongside English can unlock community engagement that purely English content misses. Tags such as #LekkerLewe, #UmiliwaWakho, or #SATwitter carry distinct cultural resonance that broad English tags cannot replicate.
FAQ
How many hashtags should I use on Instagram in South Africa?
Instagram recommends 3 to 5 highly relevant hashtags per post as of 2024. Earlier advice to use 30 hashtags is outdated. For South African brands, focus on a mix of location-specific tags such as #Johannesburg or #CapeTown, industry tags relevant to your sector, and branded or campaign-specific tags. Quality and relevance outperform quantity.
Do hashtags still work on LinkedIn?
Yes, but with restraint. LinkedIn recommends using 3 to 5 hashtags per post. Professional hashtags such as #DigitalMarketing, #Entrepreneurship, and location tags such as #SouthAfrica perform well. Avoid using LinkedIn hashtags the same way you would Instagram - LinkedIn's algorithm rewards relevance and professional context over high hashtag volume.