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All lessons in Digital and Web Analytics Lesson 7.3 of 32

Comparing periods and benchmarking

Your roadmap for this lesson

  • MoM, YoY, and target comparisons
  • The percentage change formula
  • Internal, competitor, and industry benchmarks

Short answer

Compare periods three ways: month over month for short-term direction, year over year to remove seasonality, and against target to check the plan. Percentage change is current minus previous, divided by previous, times 100. Report both the number and the percentage. Use benchmarks, especially your own history, to ask better questions.

Three comparisons

  • Month over month (MoM): short-term direction, but affected by seasonality.
  • Year over year (YoY): same period last year; removes most seasonal effects.
  • Against target: shows whether the plan is on track.

Percentage change

Change = (Current − Previous) ÷ Previous × 100

Conversions rose from 400 to 460, a 15% increase. Report the number and the percentage: a 100% jump from 2 to 4 means little.

Benchmarks

  • Internal: your own historical averages. Most reliable.
  • Competitive: estimates from tools such as Semrush or Similarweb. Directional only.
  • Industry: published averages by sector. Useful context, but businesses vary.

Use benchmarks to ask questions, not to pass final judgment.

Quick quiz

1. Leads went from 250 to 200. Percentage change?
2. Which benchmark is most reliable?

Your action

Key terms

MoM
Month over month comparison.
YoY
Year over year comparison.
Percentage change
(Current minus previous) ÷ previous × 100.
Internal benchmark
Your own historical average.

Questions beginners ask

Why is YoY better than MoM?

YoY compares the same season, so holidays and paydays do not distort it.

Are industry benchmarks reliable?

Only as rough context. Businesses vary widely.

Related lessons

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