> For the complete documentation index, see [llms.txt](https://docs.abtasty.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.abtasty.com/account/tag-integration/understand-ab-tasty-tag-implementation-methods/choose-between-synchronous-and-asynchronous-methods.md).

# Choose between Synchronous and Asynchronous methods

The generic tag comes in two versions: synchronous and asynchronous.

## The Synchronous mode

**In synchronous mode**, your website’s code scripts will load one after the other. A script can only be loaded if the previous one has finished loading. If a script is blocked, it will stop the script after it from loading.

![All\_About\_Tags\_03.png](/files/zi58LoXc1Sn17Y3etNMC)

## Asynchronous mode

On the other hand, **in asynchronous mode**, the different calls to the scripts will be made at the same time. All the scripts will load at the same time. In this case, if a script hangs up, it will not stop the other scripts from loading.

![All\_About\_Tags\_04.png](/files/2EraPJLVZkRpzVTta3tD)\
The disadvantage of an asynchronous tag is that the screen may seem to flicker if the modifications are applied after the website loads.

{% hint style="success" %}
In most cases, we recommend using the synchronous tag for AB Tasty. If the tag is placed in your website’s **\</head>** tag, you will be sure that your modifications will be applied immediately, before the website loads. This will avoid the flickering effect and will offer an optimal user experience.
{% endhint %}


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