How Open Garph Meta Tag help to improve your SEO?

I mean all I see what is going in whatsapp is fake news rotating. Unwanted products back and forth. People still trust the medium but only just to get short messages from people whom they know already. So, in this ground is it still safe to say that it can be used to promote products?

When you guys design a lead tunnel  what do you guys prefer? A fully graphically represented tunnel or text formats that captures lead through anchor texts and send it to the sales page.

Is there any good trick to target small lists in Facebook? Small lists which are pixel tagged about 500 or so audience. Small lists are quite expensive to target and they ain't getting cheaper as the time is passing.

Digital Marketing Certificates, does they have any value? I mean when it comes to getting success in this field and making money.

Say if I wanted to rank a domain in co.uk rather than the .com version of it. Then will these tags be helpful. I am new so I don't know much about them.

Pretty much everyone is saying their own opinions. Every blog is trying to sell something. With all these happening how do you guys get the real information?

Which links can perform well? Textual links or other type of links which are from footers and other what not's.

Which tool can track specific keywords with high numbers both locally and internationally?

Is there a single tool you guys use or a bunch of them for domain visibility, kw research, content optimization, competitive analysis etc?

I know these are all elaborate functions but is there any tool that can do all of these?