• What Is Base64 Encoding?

  Base64 encodes bytes into ASCII for transport. It is encoding — not encryption.

• How to Calculate CPM

  CPM is the cost of one thousand impressions. It is useful for reach and awareness buying — not a substitute for CPA or ROAS.

• CPM vs CPC vs CPA: What’s the Difference?

  CPM prices impressions, CPC prices clicks, and CPA prices acquisitions. Match the buying model to the objective.

• How Much Should You Spend on Google Ads?

  Start with a test budget large enough to exit learning, then scale campaigns that hit your target CPA or ROAS.

• How to Compress Images Without Losing Too Much Quality

  Resize to display size, prefer modern formats when allowed, then compress — and keep originals.

• How to Set a Freelance Hourly Rate

  Divide target income by realistic billable weeks and hours so your rate funds non-billable time.

• How to Calculate VAT

  VAT calculators add tax to a net amount or extract tax from a gross amount at a rate you choose for your jurisdiction.

• Margin vs Markup Worked Examples

  Markup and margin are related but not interchangeable. Quote the right one when briefing freelancers or finance.

• How to Build UTM Tracking Links

  UTM parameters tag campaign traffic. Set at least utm_source, utm_medium and utm_campaign — lowercase and consistent.

• Profit Margin vs Markup: What’s the Difference?

  Markup is profit as a percentage of cost. Margin is profit as a percentage of revenue. A 50% markup is not a 50% margin.