There are many great visualizations available in Microsoft Power BI, but some of the most popular and effective include:

Bar charts: Bar charts are a great way to compare values across different categories. They are easy to understand and can be used to show trends over time.

Line charts: Line charts are another great way to show trends over time. They are especially useful for showing changes in values that are closely related.

Pie charts: Pie charts are a good way to show the relative size of different parts of a whole. However, they should only be used when there are a small number of categories.

Area charts: Area charts are similar to line charts, but they show the cumulative value of a series over time. This can be useful for showing how a value has changed over time relative to a baseline.

Treemaps: Treemaps are a good way to show the hierarchical relationships between different data points. They are especially useful for showing how data is organized into different levels.

Maps: Maps are a great way to visualize geographic data. They can be used to show the distribution of different values across a region or to show how a value has changed over time in different locations.

These are just a few of the many great visualizations available in Microsoft Power BI. The best visualization for your needs will depend on the type of data you are working with and the insights you are trying to communicate.

Here are some additional tips for choosing the right visualization:

Consider the audience: Who will be viewing your visualizations? What level of understanding do they have of the data?

Think about the message: What do you want your visualizations to communicate? What insights do you want to highlight?

Keep it simple: Use simple visualizations that are easy to understand. Avoid using too many colors or complex graphics.
Use labels and annotations: Use labels and annotations to help explain your visualizations. This will make it easier for your audience to understand the data.