Once upon a time, there was a tiny little search engine in British Columbia that thought it would be nice to have a new META tag that webmasters could use to tell them when to revisit a page.
This tag is now commonly seen in the header of sites across the web:
<meta name="revisit-after" content="7 days">
or:
<meta name="revisit" content="7 days">
There are a few logic problems with this entire concept, which is why the Canadian search engine quickly abandoned its use and no longer supports it, and why no other search engine has implemented it as a standard. Aside from the fact that there is no convention that defines the variables (could you say 1,365 days and still expect it to work?) let me point out a few problems with this logic and see if I can dispel this myth:
1. A search engine schedules its own crawl rate, so if it takes 19 days to crawl the entire web, and then the robot comes to a page that says 20 days - what happens? Does the robot leave and come back later when the 20 days has expired?
2. What happens when a webmaster gets impatient, and keeps changing the number? What is the robot supposed to do when it sees the number change from 20 down to 2 days? Or, then to 7 days?
3. Most importantly, why would a search engine come back every 2 days when a page doesn't change for several years? Many pages become 'orphans' and never change as their webmaster forgets about them, so why come back every 2 days to crawl a page that never changes?
And yet, this 'myth' is perpetuated, as one webmaster sees it on a competitor's site, and thinks, "Oh, oh - I better add that META tag if my competitor has it." Before you know it, the web is filled with this META tag and people start to believe in the mythical properties of this tag. Like you somehow need it in order to get your page up on page one of the SERP.
It's a lot like when somebody sneezes, and you say, "Bless You." Does it help that you say those words? If you never said a word, would that person really shrivel up?
The 'revisit' tag is a myth, but I guess that if it makes you feel good, go ahead and use it. Will it help you get your page up to #1 in the SERP? No. Not as far as I know. But I've been wrong before, so why should you listen to anything that I have to say...
I'm sorry that I have blogged about this before, but this myth just won't go away, and a new client seems to be stuck on this idea as being valid...
Labels: SEO Myths