LETHIR RESOURCES
Advertising guides and tools
Practical Google Ads and Meta Ads resources for individual advertisers and agencies: campaign audits, ROAS calculations, and AI-assisted ad management.
Whether you run ads for your own business or review performance for a client, start with a clear question: what happened, what might explain it, and what should you check before changing a campaign?
AI ad management for Google and Meta
Explore Lethir's AI-assisted advertising workflow for individuals and agencies: review campaign performance, prepare changes, and keep control of your ads.
Read the guide →Google Ads and Meta Ads campaign audit checklist
Audit ad campaigns step by step: verify conversion tracking, compare spend and results, investigate weak campaigns, and document changes before applying them.
Read the guide →Free ROAS and break-even ROAS calculator
Calculate return on ad spend, ROAS percentage, and break-even ROAS. Explore an example and see why revenue-based ROAS is different from profit.
Use the calculator →Connect Google Ads and Meta
Set up your workspace, authorize an advertising platform, select your account, and import your first campaign report.
Open the setup guides →Choose a starting point
- Reviewing your own ads? Use the audit checklist to separate a tracking problem from a campaign that needs attention.
- Preparing a client review? Record the reporting window, attribution settings, and agreed next action before presenting results.
- Comparing revenue with spend? Use the calculator to understand ROAS and the margin needed to cover advertising costs.
These resources are public and require no account. Product instructions reflect Lethir’s current capabilities; planned individual and agency plans are discussed separately on the AI ad management page.