What cookie notices are for: the files websites store
Photo: Avila Ops Tecnologia
Cookies are small files stored in visitors’ browsers to remember carts, logins, language preferences, sources, and clicks. Notices explain this and request permission for measurement or advertising cookies. The basis is LGPD Law 13.709/2018’s transparency duty.
Ask “Which cookies does my site use?” rather than “Do I need a banner?” A business site without measurement uses almost none. An online store with Meta pixel and Google Analytics uses several, making a notice sensible.
What types exist and require notices?
Practical groups:
- Necessary: cart, login sessions, form spam protection. No consent needed, only privacy-policy information.
- Measurement: visit and page counts, such as Google Analytics. ANPD recommends information and refusal options.
- Advertising: identify visitors for later ads, including Meta pixel and Google remarketing. The clearest consent case.
“We use cookies, OK” without refusal fails its purpose. Advertising cookies require choice and pixel activation only after acceptance.
When can sites omit notices?
When using only necessary cookies. A five-page site with a contact form and WhatsApp link, without Analytics or pixels, qualifies. Mention technical cookies in the privacy policy. A banner adds noise.
A carpenter measuring business-site visits through Search Console, which adds no visitor-site cookies, needs no banner. Adding pixel advertising changes that.
What to do now
List connected tools: Analytics, pixels, chat, embedded maps. Each tracker belongs in the notice with real refusal. When we build sites, the notice, policy, and pixel are configured together, firing only after consent. See a free prototype within 48 hours: avilaops.com/criacao-de-site-profissional or WhatsApp: wa.me/5517997811471.
Frequently asked questions
Does LGPD require cookie banners?
It does not name cookies. It requires transparency and a legal basis for processing, which advertising cookies do. ANPD therefore recommends always informing, allowing measurement refusal, and requesting advertising consent.
Do notices hurt conversion?
A little if large and poorly made. A discreet footer banner with two clear buttons works.
Can Meta pixel fire before acceptance?
It should not. Load only after consent. See conversion measurement at avilaops.com/guias/como-configurar-pixel-da-meta-e-medir-conversoes and the pixel definition at avilaops.com/glossario/pixel-da-meta.
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