What does the utm_source in the website address mean? It will expose where you came from. I tested two types of parameters, and the wrong link won't open at all
first: parameters have two identities: one is for fetching content, and the other is for recording the origin
the part after the question mark in a website, in jargon it's called query parameters. Don't be fooled by their huddled appearance; in fact, they have two completely different identities.
the first type is work. When searching, the wd in the URL = router , when flipping pages, page = 3, in the cloud drive sharing link, in the extraction code in the cloud drive sharing link, and in the WeChat article link, sn = a string of letters — these parameters serve as the basis for accessing content from the page. The server relies on them to know what you're searching for, which page you're on, and which article to open. If you delete them, the server won't know what you're up to.
the second is bookkeeping. The one starting with utm, or fbclid, gclid, and the like, have nothing to do with the page content at all. Bringing them in and opening it shows the article; deleting them and opening it is still the same article. The only difference is that the website's backend statistics report omits a note saying "This person came from WeChat."
of course, looking at them together, it's confusing; just open it up and it's clear. The first step in determining is always: after deleting this parameter, does the page still recognize you?
utm family of five, and a company that has been dead for nearly twenty years
utm stands for Urchin Tracking Module, which literally translates to "Urchin Tracking Module." Urchin is a website analytics software company founded in San Diego, USA in 1995. It was acquired by Google in 2005, and in 2006 the product was renamed—now known as Google Analytics. The company has long since disappeared, but the utm_ parameter prefix has become an industry norm. Operators worldwide use it, essentially a company that has been dead for nearly twenty years, with its name alive in billions of URLs.
this company commonly uses five parameters, each with different divisions of labor:
| parameter name | what | typical values |
| utm_source | from which website are they from | Weixin, Weibo, google |
| utm_medium | what types of channels | social, email, cpc |
| utm_campaign | the merit of which event | double11 newyear |
| utm_term | invested in | router recommendations |
| utm_content | which version in the same event | banner_a. Copywriting b |
to put it in plain language: the operators post a note after the link, saying, "This person came from WeChat, clicked on the social slot entry, and is calculating the Double Eleven event." Every time you open it, an extra line appears on the report. I also took in the statistics from my own blog backend, so I know exactly what the source report looks like—so I can responsibly say that UTM itself doesn't remember who you are; it records "someone from somewhere."
the ones you really need to watch out for are the brothers FBClid and GCLID
if UTM is a sticker posted at the door, then fbclid and gclid are the plates you put in your pocket. These two are unique identifiers automatically attached when Facebook and Google Ads click, and Google Ads documentation states they are used to identify campaigns and click attributes. The difference is: utm_campaign everyone can see the "Double 11 event," but the string of garbled text after FBClid is a unique number for this click. Combined with the cookie receipt on the website, it connects "the person you clicked on at the ad spot" with "the person who browsed the site later" into a line.
By the way, these parameters are plaintext following the website. It's true that URLs use HTTPS encryption, but you can see the complete link yourself, and when forwarded, others can see it too—encryption protects the transmission process, not the information attached to the end of your link. This was mentioned last time when talking about small locks.
so the privacy account should be calculated this way: a single UTM is not very damaging, knowing you "accessed through WeChat" won't cause much harm. What really makes people uncomfortable is the combination — source parameters, cookies, and click numbers, three companies working together to piece together an anonymous visitor into a profile. If you click a product link in a family group and then a shopping site recommends the same item to you, these parameters usually play a big role.
I tested two types of links, and the consequences of deleting parameters are completely different
just reasoning is useless; I deleted each real link once.
first group, my own blog. The bare address opens with 58,023 bytes. Add ?utm_source=wechat&utm_campaign=diyici to open it, and the page is normal, 58,231 bytes. There are two conclusions: first, whether UTM deletes or deletes pages opens the same way, confirming it does not participate in content retrieval; Second, pages opened with parameters 208 bytes larger than the bare address—the server records the parameters you bring into the page, and the new link spits out by the share button will be passed to the next person with the same tail. Parameters can reproduce on their own.
second group, WeChat public account article link. The URL of the official account article looks like this:mp.weixin.qq.com/s?__biz=xxx&mid=xxx&sn=xxx&chksm=xxx. I deleted all parameters and left only /s to access, which returned a page labeled "Parameter Error." For these kinds of links, the parameter is the article's ID card—sn locates the specific article, chksm is the validation string, and no matter which link you do, you can't open it.
Look, even the same thing after the question mark—one type deletes 'World Peace,' the other type ends up flopping on the spot. So don't believe one-sided claims like "all link parameters can be deleted" or "none can be deleted."
which parameters are absolutely immovable? Identify them clearly with one table
summarize what I have stepped on and what I've tested, and before sharing the link, take a look at this table:
| parameters, appearance | identity | can be deleted |
| utm_ The family of five at the beginning | remember their origins | delete at will, the page runs as usual, |
| fbclid the gclid | ad click number | if you can delete it, it's still recommended to delete it |
| ?v=20261005 These timestamps | cache tricks can be | deleted at the cost of reloading files |
| wd, q, keyword | search terms | delete and return to the homepage or leave the results blank |
| page, pn | page | If you delete it, it jumps back to the first page: |
| sn, mid, __biz, chksm | WeChat articles ID card | absolutely cannot be deleted, deleting will cause an error |
| pwd, code, shareId, inviteCode | extraction code/share/invite | cannot be deleted; if deleted, the content no longer belongs to you |
rule is actually one sentence: guess the purpose by the name. Items with utm or click id are 90% for bookkeeping; Words like page, code, id, pwd are 90% of the time they're working. If you're unsure, don't change the original link. Copy one copy, delete the parameters, and try clicking it yourself. If it doesn't work, use the original link. Another easy thing to mix up: the common t.cn and dwz.cn short links online are a different matter. They hide the entire long URL, so before unfolding, you can't even see if it has tracking parameters, so it's hard to clean it up before sharing.
three paths to cleanup and one rule before forwarding
really want to clear it up, so prioritize the three routes based on convenience.
the easiest thing is browser extensions. Search for keywords like "clear URL tracking" in the Chrome app store. After installing it, when copying links, it automatically strips utm and fbclid from the list, and right-clicking also offers a cleanup option. There is an open-source link cleaning tool on Android phones. The principle is the same: remove any items from the tracking list from the parameters and then give it to you.
the cleanest is manual deletion. Focus on the question mark and delete the entire segment between the question mark and the next hash number—remember to keep the anchor point after the hash mark, as that thing won't be sent to the server at all, tested last time . If links mix 'deletable and can't' links, pick them out one by one, and check each time you delete them.
the dumbest but most reliable thing: don't change it, ask yourself before reposting the link, who is it for? Recommend a good product to family and friends; whether you bring a UTM or not doesn't really matter; If you want to post in group chats, public places, or if you don't want the other website to know where you came from, then delete it thoroughly before posting.
Wrap up with a clear order: copy the link, check if there's a UTM or click ID after the question mark, delete it if it does, click once to confirm it can open, then send it. Apply this rule to forwarding—it's more effective than buying a 100-yuan privacy sticker. There's another layer of relationship between cache and parameters. If you want to dig deeper, you can the article on web cache— timestamp parameters are used for this purpose.
