How to use Google Trends for keyword and topic research

Executive overview

Search volume alone misleads: a keyword can show high monthly searches while the underlying trend is dead or collapsing. Google Trends adds the time dimension that volume figures lack.

Pair Trends with a keyword tool like Ahrefs to validate topics before investing in content. Five techniques cover the most valuable use cases.

The core insight: trend direction matters more than snapshot search volume — always check the history before committing to a topic.

Understanding the data

• Trends scores are relative popularity (0–100), not absolute search volume
• The scale reflects a term's share of all searches, so two terms with identical trend shapes can have very different actual volumes
• Always set the date range to at least 5 years to reveal reliable patterns; 30-day windows are misleading

Identifying seasonal trends

• Seasonal dips are predictable — use the 5-year view to confirm recurrence before acting on them
• Not all related terms follow the same seasonal curve (e.g. outdoor golf declines in winter; indoor golf rises)
• During off-peak periods, promote products unaffected by seasonality or shift focus to counter-seasonal lines
• Use Interest by Subregion to target paid ads at specific states or cities where demand remains high in the off-season
• Prepare content 4–6 weeks before the seasonal peak, not after it arrives

Avoiding dead-end keywords

• A keyword with high average monthly volume can be a post-peak relic (e.g. fidget spinner)
• If the 5-year trend is flat or near zero, the volume figure is an inflated historical average — avoid it
• Check the last 12 months in isolation to confirm whether a declining trend is still declining

Finding related keywords and competitor gaps

• Related Topics and Related Queries surfaces adjacent intent — useful for expanding a content plan
• Switch between Rising (fastest-growing) and Top (most popular overall) to see different opportunity sets
• Type a brand name to find competitors in the Related Queries list, then validate those comparison keywords in a keyword tool
• Comparison queries (e.g. "HubSpot vs Salesforce") often have low keyword difficulty and high click-through rates because users read multiple results before deciding

Global SEO and market prioritisation

• Interest by Region shows which countries have the highest branded search share — a signal for localisation and hreflang implementation
• Add a competitor to the comparison view to see market share by country and identify geographies where your brand is weak
• Drill down from country to metro area for more precise targeting

Selecting YouTube topics

• Google web search trends and YouTube search trends do not always move in the same direction — check both using the Search Type filter
• For content tied to a specific release (song, product, film), the optimal window is before or at the peak, not after the decline has set in
• Slower-declining trends still offer a trailing opportunity; flatlined trends do not