All traffic reports show where the web traffic comes from.
Generally, Google Analytics offers five categories of standard reports: Real-Time, Audience, Traffic Sources, Content, and Conversions. In addition, these categories include dozens of standard report subtypes.
In particular, Traffic Sources Reports is the biggest category with 25 reports for tracking different traffic channels. You can use them to learn what people type in search engines to find your website, where they come from, and other details. It’s useful information to measure your marketing efforts and focus on the most effective traffic channels.
If All traffic and other reports from the Traffic Sources category don’t meet your needs, you can create custom reports. To do it, go to the Customization in the Reports section and pick the dimensions (e.g., city) and metrics (e.g., page views). Note that not every dimension can be combined with every metric. For example, there are user-level, session-level, or hit-level dimensions and metrics. Hence, you need to select the value of the same level.