If you have a very good webpage or blog that you maintain with good, valuable and fresh content you can link to it, because that will help it to become an authority in this space and rank higher on searches also. But it must be structured very well with not to many clicks to take your prospect to where you want him/her to go, that is to your converting funnel. You want them to take the action you intended for them. People don't normally click more than 3 times after reading your ad, so make it short.
To link to your gateways directly might work better sometimes to get the desired results.
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If you have a very good webpage or blog that you maintain with good, valuable and fresh content you can link to it, because that will help it to become an authority in this space and rank higher on searches also. But it must be structured very well with not to many clicks to take your prospect to where you want him/her to go, that is to your converting funnel. You want them to take the action you intended for them. People don't normally click more than 3 times after reading your ad, so make it short.