How can I dynamically update the meta title and description on a Webflow site using JavaScript? I want to display the updated information from a collection list on the page, but I am unsure if this will affect SEO.

To dynamically update the meta title and description on a Webflow site using JavaScript, you can utilize the Webflow CMS and the built-in meta tags feature.

First, you'll need to create a Collection in Webflow where you can store the meta title and description for each page. Within your Collection, make sure you have fields for the meta title and description.

Next, navigate to the page where you want to dynamically update the meta tags. Select the page in the Webflow Designer, and under the Page Settings panel, click on the Custom Code tab.

In the Custom Code tab, you can add JavaScript to manipulate the page's meta tags. Here's an example of how you can dynamically update the meta title and description using JavaScript:

```javascript
// Get the current page's URL
const currentPageURL = window.location.href;

// Query the collection item and filter based on the current page's URL
const collectionItem = collectionSlugSlug.filter(item => item.URL === currentPageURL)[0];

// Update the meta title and description tags
document.querySelector('title').innerText = collectionItem.metaTitle;
document.querySelector('meta[name="description"]').setAttribute('content', collectionItem.metaDescription);
```

In this example, `collectionSlugSlug` is the array containing your collection items, and `URL` is the field that matches the current page's URL. Replace `metaTitle` and `metaDescription` with the corresponding fields in your collection.

This JavaScript code finds the specific collection item that matches the current page's URL and updates the meta title and description tags accordingly.

Regarding SEO, dynamic meta tags will not have a negative impact. Search engines like Google can still crawl and index dynamically generated content. However, it's important to note that meta tags alone are not the sole SEO factor. Other elements like your site's structure, content quality, and backlinks also play a crucial role in SEO.

To ensure that your Webflow site's dynamic content is properly indexed by search engines, you can also submit an XML sitemap to search engine providers like Google. This helps search engines discover and understand the structure of your website.

Additionally, you can test and validate the updated meta tags using SEO tools like Google Search Console or third-party SEO analysis tools to ensure everything is in order.

Remember to publish your site after implementing these changes so that the updated meta tags reflect on the live version of your Webflow site.