Hey @Sunil,
The purpose of a header bar is to create a navigation bar as mentioned in the How to Create and Manage Header Blocks Help Center article. Since it sounds like instead of having a header navigation bar - logo inline with text/hyperlinks - you wanted to have just your logo image centered at the top of the email, I would recommend using a standalone image block populated by your logo for best results.
Because you are using the Logo Centered option for the header block which allows the populated logo to be inline with the text, removing the additional text or image fields would result in a blank section as you wouldn’t have any additional fields to align with the logo. Using the Logo Stacked or Logo Inline would not have this issue as they would not require any additional alignment details as the alignment for the logo is already preset as either centered and above the links/images or left justified of all the links /images.
Regarding your product feeds have you already gone ahead and created the feed within Klaviyo? Although your catalog is synced to Klaviyo from your ecommerce platform, you still would need to recreate a feed within Klaviyo such as “best sellers”. This is further instructed in under the Manually Select Products from Your Catalog section of the How to Insert a Product Block Help Center article. I also think that reviewing the How to Use Product Feeds and Recommendations Help Center article and helpful to further understand the relationship between a product feed the product block.
How often your product catalog syncs with Klaviyo depends on the integration. You can find the sync times in the How Often Integrations Sync article we offer. For example, if you were using Shopify, product catalogs are synced between the two platforms in real time. This means that any update to a product such as the addition of a new product, update in price, image, URL, etc. would be updated in Klaviyo in real time. If you were having trouble with your product catalog I would suggest reviewing your backend integration and ensuring the integration is up to date and connected without any issues.
I would also encourage you to take a look at some of our helpful Academy Courses that can give you a hand as you’re get started!
David