# Page custom parameters

# What is a page custom parameter?

In addition to the general data that FunnelFlex.AI automatically collects for each user, you can manually pass additional client data.

For example, if you have an online store where some products have a video review and some do not, you can add the page parameter HasVideoReview. Then, you can create a personalization "Show video review or not", where you specify in the display conditions that the personalization should only trigger if the HasVideoReview parameter equals True.

# How can page parameters help?

Firstly, you can use the specified parameters in display conditions.

Secondly, these data will be used in model training.

# How long is the page parameter stored?

The page parameter is stored on the current page until it is reloaded or navigated away from.

# Methods for working with page custom parameters

# Setting a parameter

To set a page parameter within the connection script, use:

<script>
    /** INIT_SCRIPT  */

    impact('init','your-unique-project-code');
    impact('setPageParam', 'key', value) // "value" can be a string or number
    impact('start');
</script>

INIT_SCRIPT - the script to download FunnelFlex.AI, can be found in the section [Installing the script on the website](/guide/getting-started/registration-and-installation.html#installing-the script-on-the-website)

To set a page parameter outside of the connection script, use:

impact('setPageParam', "key", value)

The set page parameter starts being considered in data transmission only after it is set.

If some data has already been transmitted to the server and the page parameter is set afterward, the parameter will not be included in the already transmitted data.

Therefore, we recommend specifying all visit parameters within the connection script before calling impact('start');.

# Delete a parameter

To delete a parameter, use the function:

impact('deletePageParam', 'key')

# Get a parameter

To get a single parameter, use the function:

window.SustainImpact.getPageParam("key") // This synchronous function works only when window.SustainImpact.ready == true

# Get all parameters

To get all parameters, use the function:

window.SustainImpact.getPageParams() // This synchronous function works only when window.SustainImpact.ready == true

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