The German advertising market is highly competitive and strictly regulated by the Act against Unfair Competition (Gesetz gegen den unlauteren Wettbewerb, UWG). Any inaccuracy in ad copy can trigger a costly legal dispute with competitors.

Legal limits on ad copy under the UWG

Google Ads must not use unfounded superlatives (“Der beste Anwalt”, “Die billigste Versicherung”) unless they can be proven, for example by an independent test such as Stiftung Warentest. Competitors' registered trade marks must also not be used in the ad text, even if you target them as keywords.

German keywords and compound words

German is full of long compound nouns (Komposita), such as Krankenversicherungsvergleich or Existenzgründungsberatung. Users search for both the joined and the separate spellings. Campaigns need careful work with match types (phrase match and exact match) and constantly updated negative keyword lists.

Regional segmentation and geotargeting

Buying habits and purchasing power differ between the federal states (Bavaria and Baden-Württemberg compared with the eastern states). Effective campaigns split ad groups by major metropolitan areas and adapt landing pages to the specific cities where the business operates.

Reviewing search terms and preventing wasted spend

Because of the high cost per click (CPC) in commercial B2B niches (€5 to €25 per click), a weekly review of the search terms report is essential. Adding words such as “kostenlos”, “Vorlage”, “PDF”, “Ausbildung” or “Wiki” as negative keywords saves the budget for customers who are actually ready to pay.

What to check

  • Check ad copy for unfounded superlatives and other companies' trade marks.
  • Use exact and phrase match for complex German compound terms.
  • Exclude non-commercial traffic by regularly updating negative keyword lists.
  • Set up conversion tracking with Google Consent Mode v2, respecting users' consent.

Example situation

A law firm changed its headline from “Best lawyer in Berlin” to “Specialised legal help in Berlin”, protecting itself against a claim under the UWG and increasing the click-through rate thanks to the specific wording.

Next step

Success with Google Ads in Germany depends on legally sound wording, precise work with complex German keywords and controlling the cost per click.

Official information on this topic

Checklists and examples are organisational recommendations. Requirements depend on the procedure, the city and your situation; check them with the relevant office before you act. Please discuss legal and tax questions with an authorised professional.

This article was prepared with the help of AI. The example illustrates the approach and does not describe a client case.