Liza

Yes, this is normal when your site is compliant with privacy laws like GDPR because you must not send analytics cookies to visitors until they click the opt-in message on your cookie banner.
Once visitors click the opt-in button, cookies will be used and their analytics data will be accurate. It will be less accurate for other visitors who don't opt-in - hence the warning.
If you are looking for a way to collect analytics without using Cookies, you may want to take a look at TinyAnalytics. There are no cookies and it is fully compliant with GDPR, CCPA and PECR 🙂. It's free for up to 50,000 monthly page views.
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@JAKB, you can use the checkbox option to create a terms and conditions requirement. See screenshot. 

you're on a 7 template, so the following css code will hide the times
span.item-time { display:none !important; } if you want to hide them on the flyout/hover effects then add this
div.flyoutitem-datetime { display:none !important; } if you only want it to happen on this page (because you've got another events calendar somewhere else then you should prefix the rules with your collection id (you can use the squarespace id finder extension for this kind of thing)
body#collection-5a68ea09ec212dd1049bcecb span.item-time { display:none !important; } body#collection-5a68ea09ec212dd1049bcecb div.flyoutitem-datetime { display:none !important; }  

Some custom code to remove header on Entire Site - One Page
Support: SS 7.0 & SS 7.1
7.1 is latest version. Most sites you just created, or created in the last few months, always default to 7.1
Notes: 
Add to Home > Design > Custom CSS or Website > Website Tools > Custom CSS Squarespace 7.1
(7.1) One Page
Add to Page Header or Code Block on that page
<style> header#header { display: none !important; } </style> (7.1) Desktop only
Add to Custom CSS
@media screen and (min-width:992px) { header#header { display: none !important; } } (7.1) Mobile only
@media screen and (max-width:991px) { header#header { display: none !important; } } (7.1) After Scroll
header#header.shrink { display: none !important; } (7.1) Before Scroll
header#header:not(.shrink) { display: none !important; } (7.1) When overlay menu/burger menu is open
body.header--menu-open header#header { display: none !important; } (7.1) Blog List Page Only
body[class*="type-blog"].view-list header#header { display: none !important; } (7.1) Blog Detail Post 
body[class*="type-blog"].view-item header#header { display: none !important; } (7.1) Specific blog post
Edit that post > Add a Code Block at bottom of post > Use this code
<style> header#header { display: none !important; } </style> (7.1) Event List Page
body[class*="type-events"].view-list header#header { display: none !important; } (7.1) Event Detail
body[class*="type-events"].view-item header#header { display: none !important; } (7.1) Specific event items
Edit event > Add a Code Block at bottom of event
<style> header#header { display: none !important; } </style> (7.1) Shop/Category Page
body[class*="type-products"].view-list header#header { display: none !important; } (7.1) Product Detail
body[class*="type-products"].view-item header#header { display: none !important; } (7.1) 1 product
Edit product > Add a Code Block in Additional Info
<style> header#header { display: none !important; } </style> (7.1) Some specific products
First add a tag with name: no-header, then assign it for some products, then use this code to Custom CSS
.tag-no-header header#header { display: none !important; } (7.1) Cart Page
body#cart header#header { display: none !important; } (7.1) Search Page/Search Results
Add code to Website > Website Tools > Code Injection > Footer
<script> if (document.location.pathname.indexOf("/search") == 0) { document.querySelector('body').classList.add('t-search') } </script> <style> body.t-search header#header { display: none !important; } </style>  
Avenue
header#header { display: none; } div#mobileMenuLink { display: none; } Aviator
header#header { display: none; }  
Bedford Family
Include: Anya, Bedford, Bryant, Hayden, Bedford
header#header { display: none; }  
Brine Family
Include: Aria, Basil, Blend, Brine, Burke, Cacao, Clay, Custom Template, Ethan, Fairfield, Feed, Foster, Greenwich, Hatch, Heights, Hunter, Hyde, Impact, Jaunt, Juke, Keene, Kin, Lincoln, Maple, Margot, Marta, Mentor, Mercer, Miller, Mojave, Moksha, Motto, Nueva, Pedro, Polaris, Pursuit, Rally, Rover, Royce, Sofia, Sonny, Sonora, Stella, Thorne, Vow, Wav, West, Brine.
/* Hide Header */ .Header { display: none !important; }  
Farro:
Include: Farro, Haute
.Mobile-bar { display: none; } header.Header { display: none !important; } Five
div#navigation-top { display: none; } nav#mobile-navigation { display: none !important; } Flatiron
header#topBar { display: none; } Forte
div#headerWrapper { display: none; } Ishimoto
header#header { display: none; Momentum
header#header { display: none; } Montauk
Include: Julia, Kent, Montauk, OM
header#header { display: none; } Native
header#header { display: none; } Pacific Family
Include:  Bryler, Charlotte, Fulton, Horizon, Naomi, Pacific
header#header { display: none; } Skye Family
Include: Foundry, Indigo, Ready, Skye, Tudor
div#headerAnnouncementWrapper { display: none; Tremont
Include: Camino, Carson, Henson, Tremont
header#siteHeader {display: none;} Wexley
header#header { display: none; } /* Mobile */ div#mobileMenuLink { display: none; } York Family
Include: Artesia, Flores, Harris, Jasper, Jones, Lange, Shibori, Taylor, York
header#header { display: none; }  

I figured it out, @tuanphan! Thank you, anyway!
<style>.Header, .Footer, .sqs-announcement-bar-dropzone, .Mobile-bar{display:none !important; }</style>

This is anything but a simple question! The answer will depend on:
whether you need to retain backend data (customer or sales data) whether you want to remain on 7.0 or move to 7.1. the type of site whether you need 7.1 features like 10,000 products. If you have a commerce site and you want to stay on the same version of Squarespace, it may be better to preview another template and make your changes whilst in this preview mode. This will allow you to rebrand without affecting the live site.
If you want to upgrade to Squarespace 7.1 then you may need to start again with a new trial site. However, the new site can never contain your backend data, for example commerce order history, customer accounts and analytics information. Also, the site subscription cannot be moved, so when the new site is ready, the subscription will need to be cancelled and a new one purchased.
There's an existing thread about the options below. It's not exactly the same situation but I've tried to explain some of the advantages and disadvantages of the different methods :
 
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Thank you so much Paul! I love the variant model, it's literally the only way that I'm able to run my store on squarespace! Thank you for looking into the code, you've helped me immeasurably! 

Brine (or 7.1) everytime!

I tried it and see what you mean. UGH. Thank you both for helping me out with this @paul2009and @tuanphan. Here's another time when I wish I had started with Brine. But I didn't know then what I know now. Live and learn.
 

On the Five template, the site logo can appear on mobile if you position the logo in the banner instead of the header. You can set this in Site Styles, by setting the Banner Content tweak to "Site Title Logo Tagline".
However, if the site logo is in the header (as it currently is) then the logo will always be replaced by the site title. It isn't possible to change this with some simple CSS, it will require some JavaScript (and therefore a Business plan or above).

Curious! What happens if you replace the code that Tuan provided with this:
#mobile-navigation-title a {   font-size: 20px!important; }  

try changing 20px to 10px ☠️

Hmm. I did multiple times @Paul2009. Checked on Safari and Chrome on my iphone 12, and on another iphone SE. ?? I just rebooted and still no go.
Weird. My kids see it ok. 
 

I've been using Squarespace for many years, but in the past 3 months or so I've really noticed an increase in the number of issues in the page editor/builder. I've tried in both Chrome and Firefox and it makes no difference. I've also tried it in both 7.1 and older templates and the issues remain.
Examples are:
Insert a spacer block and have to wait 10 - 30 seconds before I can move or edit any other blocks Tear-drop insert points just not showing or showing in the wrong place (like in the center of a block, rather than at the edges) Unable to shrink or expand the size of a spacer one moment, but then can a few moments later Ability to edit a page simply goes away and I have to save or discard changes, then refresh the page and then continue. Does anyone else feel like they are constantly waiting for the page editor and it is slowing down your work flow?
As someone who often spends 4 - 6 hours a day building Squarespace sites, I for one can say it is driving me crazy!

Add to Home > Design > Custom CSS
.quote-block * { color: red; font-size: 20px; font-family: monospace; font-weight: bold; }  

Does anyone know how to replicate the center column on this website? I like the scrolling function. https://www.surfacemag.com/

@media screen and (max-width:640px) { .sqs-announcement-bar-dropzone p { font-size: 8px; } }  

It will take about 2-3 minutes to check.

They used CSS position: fixed for left/right columns.