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Hashtags and the TikTok Algorithm: 6 Tips for Maximum Reach

Hashtags help TikTok categorise content, make videos discoverable and drive engagement. Here’s how the algorithm uses them—and how to choose the right ones for maximum reach.

Format

Journal

Series

Cases & Blog

Published

4 December 2025

Read time

4 min read

Author

Marswalk Editorial Team

Strategy, editorial direction, and cultural signals

Overview

How the TikTok algorithm evaluates hashtags—and how to choose the right keywords for maximum reach.

Curated by Marswalk for teams treating culture, brand, and attention as one connected system.

Topics

TikTokHashtagsAlgorithm

Hashtags are widespread across social media platforms and play a decisive role in categorising content and making it discoverable. On TikTok, one of the fastest-growing platforms in the world, these keywords are especially important for increasing video visibility and driving engagement. But how exactly do hashtags affect the TikTok algorithm, and how can you use them to their full potential?

1. The Role of the TikTok Algorithm

Before we look at hashtags, it is important to understand the TikTok algorithm. The algorithm decides which videos appear on the “For You” page—the page with the greatest influence on the visibility and virality of content. It evaluates videos based on various factors such as user interactions (likes, comments, shares), video information (captions, sounds and #), and device settings (language and location).

2. Why Are Hashtags Important?

They are an essential part of video information and help the algorithm understand a video’s content and context. Here are a few reasons why hashtags matter:

- Categorisation: They categorise content and help the algorithm assign videos to relevant topics and audiences.

- Visibility: They increase the likelihood that videos will be discovered by users searching for specific topics or trends.

- Engagement: Videos with popular and relevant keywords have a better chance of reaching a broader audience and generating more engagement.

3. How Do You Choose the Right Keywords?

Choosing the right hashtags is crucial to succeeding on TikTok. Here are a few tips for making the right selection:

- Relevance: Choose topic tags that are directly related to your video’s content. Irrelevant hashtags can confuse the algorithm and make your video harder to discover.

- Popularity: Use popular tags to increase visibility. TikTok’s Discover page can help you identify current trends and popular tags.

- A mix of broad and specific hashtags: Use a mix of widely used and specific keywords to reach both a broad and a highly targeted audience.

4. Practical Tips for Using #

- Combine hashtags: Use a combination of trending terms, niche tags and brand-specific keywords to speak to different audiences.

- Create your own hashtags: Develop unique tags for your brand or campaigns to build your own community and drive engagement.

- Hashtag challenges: Launch your own hashtag challenges to encourage users to participate and increase reach.

- Analyse and optimise: Monitor your videos’ performance and analyse which tags are most effective. Adjust your strategy accordingly to achieve consistently better results.

5. Examples of Successful Hashtag Use

- Viral trends: Using viral hashtags such as #foryou, #duet and #trend has helped many videos achieve high reach and go viral.

- Brand-specific tags: Major brands such as Nike use brand-specific hashtags like #justdoit to promote campaigns and communicate a consistent brand message.

- Community hashtags: Niche communities use specific keywords to share content and build an engaged follower base. One example is the book community, found under #booktok.

6. The Role of Hashtags in Long-Term Success

Hashtags are not just a short-term tool for increasing visibility; they also play a role in long-term success on TikTok:

- Brand building: Consistent use of brand-specific hashtags can help build a strong brand identity.

- Trendsetting: Companies and content creators who adopt new trends and topic tags early can position themselves as trendsetters and take a leading role in their niche.

- Engagement strategy: Hashtags can be part of a broader engagement strategy designed to encourage users to participate and interact.

Conclusion

Hashtags are an indispensable tool for improving TikTok video performance and increasing visibility. They help the algorithm understand video content and serve it to relevant audiences. By choosing and using hashtags strategically, companies and content creators can expand their reach, increase engagement and build long-term success on TikTok. Use the tips and strategies above to unlock the full potential of hashtags and take your TikTok presence to the next level.

If you want to learn more and discover how we can optimise your social media presence, take a look at our Services or book a free initial consultation with us here directly. We look forward to meeting you and achieving great results together! 🚀