Filters.

Filters
What are Filters in Google Analytics?
Filters can be described as the level of privacy or access that you provide to each account level and then apply the same settings to one or more views. Google Analytics helps you in creating filters at the view level that basically apply to only that view. You can also handle the account level filters that can be applied to the view. Filters are used to provide all the flexibility so that you can modify or manage the data that is being collected from the Google Analytics views in an organized way. They are considered as the building blocks of any Google Analytics account.
Basically, Google Analytics, on default, collects data of all the visitors of your website. But, if you want to have only a small subset of the data in a view, you can apply filters to the data that is collected. By applying filters to a huge data, you can collect useful information or insights about certain aspects of your business. Filters provide you only a specific portion of your data depending on the settings that you have applied to a particular view.
How to Create Filter at the View Level
Here are the steps listed down that help you to create filter at the view level:
Sign in to your Google Analytics account.
Click the admin portion and navigate to the view for which you want to create a filter.
Click filters in the View column.
Click + New Filter option.
Select Create new Filter.
Enter a name for the filter.
Select Predefined filter or custom filter depending on your requirements.
Select the views for which you want to apply the filter by navigating to the Available Views List. Afterward, click Add.
Click Save and your filter will be created.