The short answer
A Task 1 overview summarises the main patterns in the visual: major changes, contrasts or stages. Select the features that explain the whole picture, then use the body paragraphs for supporting figures and detail.
Read the labels before describing the trend
Check the title, units, categories and time period before writing. A chart of percentages is not a chart of total numbers, and a forecast requires different language from a record of past events. Misreading a label can undermine an otherwise accurate description.
Ask which two or three features distinguish the visual. Look for the highest and lowest categories, a reversal, a stable pattern or the largest change. For a process diagram, think about the starting point, end point and major stages instead of forcing trend vocabulary onto it.
Group information around comparisons
Avoid listing every number in the order it appears. Group categories that behave similarly, or contrast the most important differences. An overview can remain broad while the next paragraphs provide the numerical evidence.
Check meaning before adding vocabulary
Use rose to for an endpoint and rose by for the size of an increase. Distinguish percentage points from percentage change. If a share moves from 20% to 30%, the difference is 10 percentage points; describing it simply as a 10% increase would be inaccurate.
Leave out explanations the chart does not provide. A fall in visits does not prove that a branch closed or that readers switched to ebooks. In a final check, match each comparison to the data and remove speculation. Practise writing three possible overviews, then keep the one that covers the most important features most directly.
Before your next attempt
- I checked units and whether the data are past or projected.
- My overview identifies the main pattern.
- Every stated cause is actually supported by the visual.
Frequently asked questions
Is an overview the same as an introduction?
No. The introduction identifies what the visual shows; the overview summarises its main features.
Should I describe every number?
No. Select important features and provide enough data to support useful comparisons.
Sources and editorial notes
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