your redirects has to be in your server if not it'd be hard to manage that by yourself.

What you ahve to be sure is how those redirects have been done.

If they're on a dedicated HTACCESS, then it would be fine as, like you said, you'll ba mainitainig hte exact same  URL structure, but if they're maintained by a WP plulgin or JS, be sure to not ovverwrite it, or if you want to get rid of it, export your rules and rewrite them on your htaccess.

Hi,

So if I've understood correctyl you want to redirect your blog.domain.com to domain.com/blog?

If that's so you have two possible options.

1. Maintain the old site URI structure. In this case you want to make a 1by1 redirect:
RewriteRule (.*) http://www.domain.com/blog$1 [R=301,L]

2. move everything to a compelte new system. In this way it'd be impossible to maintain the old URI so you may want to, create dedicated redirects to you r best urls and use the follwoing
RewriteRule . http://www.domain.com/blog [R=301,L]

the htaccess has to be placed in the root folder of your subdomain.

i hope it makes sense

hey Sam! Happy to have been of help, I'll double check if I find the way google calculates it just for knowledge.

Happy remarketing!!

It really depends on which are your purposes. 99% of the tiem remarketing campaigns are pointing to direct response goals. In that sense it may be best to use CPC bidding to better calculate your ROI.

If your remarketing campaign are for branding purposes then a CPM may be the best way to be sure your ad is getting the highest exposure possible.

I think that CPC is the best model in terms of ROI calculations, just depends if you have catchy banners with your phone/branded so you want them to be shown as much as possible or if you have text links pointing to your best converting page.

Moreover. I remember that google translates CPC bids into eCPM ones when competing which means that if your CTR is really low you may risk of paying even more than by bidding with CPM. I can't reckon the exact formula, maybe someone can help here, but I remember that if your CTR is lower than 0,10% you may consider CPM since you're paying much less for 1 click than for a thousand impressions. (need more insight on this)

I agree with George, manual editing is always the best one.

Export your db, then in excel you can easily spot the titles longer than 70 chars and edit them to be shorter than that.

if you have a plugin to set your titles you can update your database using excel just be sure to use the len function to be sure that the new titles are shorter than 70 chars.

Hi Niki, I think that your strategy to maintain the url short is good, it's always best to give short urls if they're descriptive enough. Normally the best thing to do is to give to users an URL which let them understand what a page is about without clicking into it, this may be beneficial also in linkbuilding since people linking to you with your url will involve also some traffic if the linking site is thematically related.

About the structure I think that 3 categories are not that much, it really depends on how many products or child pages you have. The best thing to do is to organize them in a way which is thematically organized having all your page not more than 3-4 clicks away from your home, in that way you'll be sure that google can easily find and crawl them frequently because a page deep in your website may not be found or crawled that much.

Hi Sandra, don't worry about 404s volume because they won't hurt your rankings.

About your issue I understand that you want to be really clear with your users and don't hurt their experience on the site. So create a custom 404 which changes its content depending of what page is returning it. If it's one of your old product you can return a message or an article of why you decided to remove them and propose some alternatives. For all other errors you can just return a search box or related products to the one you lost.

301 IMHO are not the way to go, if an url is gone it has not being redirected anywhere, so a 301 will result in a bad UX 99% of the time.

Hey Circa, this may be negative seo from a competitor it may be spammers or fishers and so on, it's difficult to know.

Your drop may depend on that depending on how much those links are part of your whole backlinks portfolio, as generalzod said, if you have a 75% of your links like those one they could have hit you if they're kind of 10% you may  have different issues there, since every site has some porn or spam links pointing to them and google knows that.

If I were you I'll buy a subscription to ahrefs or majestic seo, get all your links, find the crappy ones, and ask for removal. then the ones which remains can be disavowed.

After that wait for a couple of days and submit a reconsideration request to google saying them you've also submitted a link disavow. Explain them what happened in details.

To prevent this in the future you can use ahrefs/majestic new/lost links feature so you can watch which links you're acquiring everyday and if there's something wrong you can ask for removal /disavow them.

Hope that helps!