Linking every important-looking phrase does not necessarily make a paragraph more useful. It can simply make it more tiring. I think of an internal link as a brief direction towards the next question a reader may have.
One guide, several distinct questions
A social strategy guide might introduce channel choice, content pillars and measurement. Rather than force every detail into one page, it can lead to articles that answer each narrower question thoroughly.
Those articles should retain a route back to the wider guide. Someone examining channel choice may want to understand how it fits the overall strategy. This creates a relationship between levels of information rather than merely increasing page count.
Give each link a reason to exist
I prefer wording that describes the destination over click here. A link to preparing a content inventory tells the reader what they will gain by following it. The surrounding sentence should match the destination’s actual scope.
A shared keyword is not sufficient reason to connect two pages. The reader’s need may differ even when the vocabulary overlaps. Expanding a paragraph awkwardly just to insert a link is not a useful editorial improvement.
Distinguish neighbouring articles
If two supporting pieces answer the same question with similar detail, I review their boundaries first. Linking them together does not solve duplication. One might become a comparison and another a practical guide, with that distinction visible in their titles and openings.
Heading hierarchy clarifies relationships within a page; a topic map does so across pages. I give each planned article a primary question and a sensible next reading destination.
Check both directions after publication
A new article linking to an existing guide may also need a link from that guide. Otherwise it can remain difficult to discover. Language switches should likewise lead to genuine equivalents, not loosely related material.
The number of links is not my definition of success. What matters is whether the next step taken to resolve a question leads somewhere useful.